《仙经》曰∶欲求长生，先去三尸，三尸去则志意定，志意定则嗜欲除。三尸在人身，
令人多嗜欲喜怒悖恶，令人早死。故仙人服药求仙，先去三尸，三尸不去，则服药无效焉。
《河图纪命符》曰∶天地有司过之神，随人所犯轻重以夺其算，纪。恶事大者夺纪（纪
一年也，）小者夺算（算，一日也。）随所犯轻重，所夺有多少也。人受命得寿，自有本数，
数本多者，纪算虽尽，故死迟；若所禀本数少而所犯多者，则纪算速尽，而死早也。又人身
中有三尸，三尸之为物，实魂、魄、鬼神之属也。欲，使人早死，此尸当得作鬼，自放纵游
行餮食人祭 ，每到六甲穷日辄上天白司命道∶人罪过，过大者夺人纪，小者夺人算。故求
仙之人，先去三尸，恬淡无欲，神静性明，积众善，乃服药有益，乃成仙。
《大清经》曰∶三尸，其形颇似人，长三寸许，上尸名彭倨（蒲庚反，音据），黑色，
居头，令人好车、马、衣服；中尸名彭质，青色，居背，令人好食五味；下尸曰彭矫（举夭
反），白色，居腹，令人好色淫 （音逸）。是以真人先去三尸，恬淡无欲，精神清明，然后
药乃有效。故庚申日夜半之后，向正南再拜咒曰∶彭侯子彭常子命儿子悉入窈冥之中，去离
我身。三度言。每至庚申日勿寝，面呼其名，三户即永绝去。当用六甲穷日者，庚申日也，
六甲六十日至庚申日且适（音释），勿寝，皆再拜而呼其字，至鸡鸣，乃去一尸一虫，后庚
申日亦用前法三过止，三虫伏尸即永绝去矣。试之皆验。心恒呼此三尸字，即去离我身。三
日取桃叶，热烧石令热，以叶着上坐，去三尸。
又云∶真人去伏尸三虫方用∶三月三日取桃叶捣取汁七升，以苦酒合，煎得五合，先食
顿服之，令人百病愈。
又方∶道迹神人曰∶欲求长生，先去三尸，欲去之法∶
狗脊（七枚） 干柒（二两） 芜荑（三升）
凡三物，末，筛，以水服一合，日再，七日上尸去，九日中尸去，十二日下尸去。其尸
形似人，以绵裹之，埋于东流水上尖之，咒曰∶子应属地，我当升天。乃易（年益反）道而
归。勿复后顾，三日之中，当苦恍惚，后乃佳。
仙人吉周君曰∶三虫未坏，三尸未死，故导引服气不得其理者是也。三虫，一名青古，
一名白古，一名血尸，谓之三虫。令人心烦萧（苏雕反）意志不开，所思不固，失食则饥，
悲愁感动，精志不定，仍以服食不能即断也。虽复断谷，人体重，奄（衣俭反）奄淡闷，所
梦非真倒错，不除虫在其内摇动五脏故也。故服削虫细丸，以杀谷虫也。
又云∶去三尸酒方∶
小麦面十斤，东流水三斗，渍之。春夏二三日，秋冬四五日，视面起，乃绞碎沛去滓，
炊稻米五升，依常法纳之，捣细筛，茯苓，天门冬各十斤合和，熟，搅令调，乃以商陆根削
皮，薄切五斤，绢囊盛置酿下，封涂，二十日出囊 汁纳酒中，去滓，又熬大豆黄卷捣末一
升纳酿中，封涂，五日出，服如枣核一枚，日三，至二十日后服如鸡子黄，日三。上尸百日
出，中尸六十日出，下尸三十日出。其形颇似人，长三寸许，上尸黑，中尸青，下尸白，即
衣五彩藏笥中。明日夜葬之于东流水傍，如冢墓状，悲哭以已名字呼祝之曰∶人生于天，精
神受于阳，形骨受于阴，今以精神归于天，形骨归于地。与子长决于无间之野，吾将去子，
翱（五劳反）翔（似羊反）于九天之上。毕，即洒身易道而归，勿反顾。常作三日惆（直由
反）怅，如失魂魄，过此乃佳。
《仙经》说：想要追求长生，必须先去除三尸。三尸去除后，意志就会安定；意志安定后，嗜欲就会消除。三尸存在于人体中，使人产生过多的嗜欲、喜怒和悖逆恶劣的情绪，导致人早死。所以仙人服药求仙，先去除三尸；如果三尸不去除，那么服药也是无效的。
《河图纪命符》说：天地之间有掌管过失的神灵，根据人所犯错误的轻重来剥夺其寿命（“算”指一日，“纪”指一年）。恶行大的剥夺“纪”，恶行小的剥夺“算”。根据所犯错误的轻重，被剥夺的寿命有多有少。人受命获得寿命，自有原本的定数。原本定数多的人，即使“纪”和“算”耗尽，死亡也会较晚；如果禀赋原本定数少而犯错多的人，那么“纪”和“算”会迅速耗尽，从而早死。另外，人身中有三尸，三尸这种存在，实际上属于魂、魄、鬼神之类。它们希望人早死，这样它们就能变成鬼，自由放纵地游行并吞食人的祭祀食物。每到六甲穷日（干支纪日法中的特定日子），它们就上天向司命神报告说：“这个人的罪过。”罪过大的剥夺人的“纪”，罪过小的剥夺人的“算”。所以求仙的人，先去除三尸，保持恬淡无欲，精神宁静本性清明，积累众善，这样服药才有益处，才能成仙。
《大清经》说：三尸，它们的形状很像人，长约三寸左右。上尸名叫彭倨（音据），黑色，居住在头部，使人喜好车马、衣服；中尸名叫彭质，青色，居住在背部，使人喜好五味饮食；下尸名叫彭矫（音举夭），白色，居住在腹部，使人喜好女色淫逸。因此真人先去除三尸，保持恬淡无欲，精神清明，然后药物才有效。所以在庚申日的半夜之后，面向正南方拜两次并念咒语说：“彭侯子、彭常子、命儿子，全部进入幽深冥暗之中，离开我的身体。”重复说三遍。每逢庚申日不要睡觉，面对呼喊它们的名字，三次之后它们就永远离去。应当使用六甲穷日的时候，就是庚申日。每六十天到庚申日时，不要睡觉，都拜两次并呼喊它们的名号，直到鸡鸣时分，就会去掉一尸一虫，之后的庚申日也使用前面的方法重复三次即可，体内的伏尸三虫就永远离去了。尝试过都验证有效。心中经常呼唤这三尸的名字，它们就会离开我的身体。第三天取桃叶，烧热石头让石头变热，把叶子放在上面坐着，以此去除三尸。
又说：真人去除伏尸三虫的方子用：三月三日取桃叶捣碎取汁七升，与醋混合，煎煮得到五合，饭前一次性服用，能让人百病痊愈。
又一个方子：道迹神人说：想要追求长生，先去除三尸，去除的方法是：
狗脊（七枚） 干漆（二两） 芜荑（三升）
以上三种药材，研末，筛选，用水送服一合，每天两次。七天上去除上尸，九天去除中尸，十二天去除下尸。这些尸体的形状像人，用绵包裹它，埋在向东流动的水流上方的尖头处，念咒语说：“你应该归属于地，我将升天。”于是改变道路回家。不要再回头看，三天之内，可能会感到痛苦恍惚，之后才会好转。
仙人吉周君说：三虫未坏，三尸未死，所以导引服气不得要领的就是这种情况。三虫，一名青古，一名白古，一名血尸，称为三虫。它们让人心烦意乱，意志不开阔，思虑不稳固，饥饿时觉得饿，悲伤忧愁感动，精神意志不定，因此即使服用食物也不能立即断绝欲望。虽然又停止进食（辟谷），人体沉重，昏昏沉沉淡漠烦闷，所做的梦不真实且颠倒错乱，这是因为虫子在体内摇动五脏的缘故。所以服用削虫细丸，以杀死谷虫。
又说：去除三尸的酒方：
小麦面十斤，东流水三斗，浸泡它。春夏两季两三天，秋冬两季四五天，看到面发酵起泡，就绞碎过滤去掉渣滓，蒸稻米五升，按照常规方法加入其中，捣细筛选，茯苓、天门冬各十斤混合均匀，煮熟，搅拌使其调和，然后用商陆根削去皮，薄切五斤，用绢袋盛装放置在酒酿下面，封口涂抹，二十天后取出袋子，将汁液倒入酒中，去掉渣滓，又将熬制的大豆黄卷捣成末一升放入酒酿中，封口涂抹，五天后取出，服用如枣核大小的一枚，每天三次，二十天后服用如鸡蛋黄大小，每天三次。上尸一百天排出，中尸六十天排出，下尸三十天排出。它们的形状很像人，长约三寸左右，上尸黑色，中尸青色，下尸白色，就用五彩衣服包裹藏在竹箱中。第二天晚上在东流水旁边埋葬，像坟墓的样子，悲伤哭泣并用自己的名字呼告祝祷说：“人生于天，精神承受自阳，形骨承受自阴，现在将精神归还给天，形骨归还给地。与你永别于无边无际的原野，我将离去，翱翔于九天之上。”完毕，就洒身换衣回家，不要回头。常常会有三天的惆怅感，如同失魂落魄，过了这段时间就好了。
The *Xian Jing* (Classic of Immortals) states: To seek longevity, one must first eliminate the Three Corpses (San Shi, parasitic entities believed to reside in the human body and cause illness or death). Once the Three Corpses are eliminated, the will becomes stable; once the will is stable, desires are removed. The Three Corpses exist within the human body, causing excessive desires, anger, joy, and perverse malice, leading to premature death. Therefore, immortals take medicine to seek immortality by first eliminating the Three Corpses; if the Three Corpses are not eliminated, taking medicine is ineffective.
The *Hetu Jiming Fu* (Riverside Chart Record of Life Decree) states: There are deities in heaven and earth who oversee faults, depriving individuals of their lifespan based on the severity of their transgressions. A "Suan" (Calculation) refers to one day, and a "Ji" refers to one year. Major evils result in the deprivation of a Ji, while minor evils result in the deprivation of a Suan. Depending on the severity of the transgression, the amount deprived varies. Humans receive their lifespan with an inherent numerical limit. Those with a large inherent limit may die later even after their Ji and Suan are exhausted; conversely, those with a small inherent limit who commit many transgressions will have their Ji and Suan quickly exhausted and die early. Furthermore, there are Three Corpses in the human body, which belong to the category of Hun (Ethereal Soul), Po (Corporeal Soul), and ghosts/spirits. They desire humans to die early so that they can become ghosts, roaming freely and consuming human sacrifices. On every "Liu Jia Qiong Ri" (the end of each six-year cycle in the sexagenary cycle), they ascend to heaven to report to the Siming (Director of Fate): "This person's sins." Major sins lead to the deprivation of a Ji, and minor sins lead to the deprivation of a Suan. Thus, those seeking immortality first eliminate the Three Corpses, maintaining tranquility and lack of desire, keeping the spirit calm and nature clear, accumulating good deeds, so that taking medicine is beneficial and immortality can be achieved.
The *Da Qing Jing* (Great Purity Classic) states: The Three Corpses resemble humans in shape, approximately three cun long. The Upper Corpse is named Peng Ju (Pú Gēng fǎn, pronounced Jù), black in color, residing in the head, causing people to desire carriages, horses, and clothing; the Middle Corpse is named Peng Zhi, green in color, residing in the back, causing people to desire the five flavors; the Lower Corpse is named Peng Jiao (Jǔ Yǎo fǎn), white in color, residing in the abdomen, causing people to desire lust and sexual indulgence. Therefore, true persons first eliminate the Three Corpses, maintaining tranquility and lack of desire, making the spirit clear, so that medicines become effective. Thus, after midnight on Gengshen days, face due south, bow twice, and recite the mantra: "Peng Houzi, Peng Changzi, Mingzixi, all enter into profound darkness, leave my body." Repeat this three times. On every Gengshen day, do not sleep; face forward and call out their names. After three times, they will permanently depart. One should use the Liu Jia Qiong Ri, which is the Gengshen day. Every sixty days, upon reaching the Gengshen day, do not sleep, bow twice, and call out their titles until cockcrow, at which point one corpse and one worm are removed. Use the previous method for three repetitions on subsequent Gengshen days, and the hidden corpses and three worms will permanently depart. Trials have verified this. Constantly calling these three corpse names in the mind causes them to leave my body. On the third day, take peach leaves, heat stones until hot, place the leaves on them, and sit on them to remove the Three Corpses.
It is also said: The formula used by true persons to eliminate hidden corpses and three worms: On the third day of the third month, take peach leaves, crush them to extract seven sheng of juice, mix with vinegar (Ku Jiu), and decoct until five he remain. Take orally in one dose before meals; this heals hundred diseases.
Another formula: The Divine Man of Daoji says: To seek longevity, first eliminate the Three Corpses. The method to eliminate them is:
Gouji (Seven pieces) Ganqi (Two liang) Wuyi (Three sheng)
Grind these three substances into powder, sift, and take one he with water, twice daily. After seven days, the Upper Corpse is removed; after nine days, the Middle Corpse is removed; after twelve days, the Lower Corpse is removed. The form of these corpses resembles humans. Wrap them in cotton, bury them at the tip of a sharp object placed in flowing eastward water, and chant the mantra: "You should belong to the earth, I shall ascend to heaven." Then change your path and return home. Do not look back. Within three days, you may experience painful trance-like states, after which you will feel better.
Immortal Ji Zhoujun says: As long as the three worms are not destroyed and the three corpses are not dead, the reason why daoyin (guiding and pulling exercises) and fuqi (swallowing air) practices fail to achieve their principles is due to this. The three worms are also known as Qinggu, Baigu, and Xueshi, collectively called the Three Worms. They cause mental restlessness, unexpanded will, unstable thoughts, hunger when food is lacking, sadness, emotional agitation, and unsettled spirit and will. Therefore, even taking food cannot immediately cut off desires. Even if fasting (duangu) is practiced, the body feels heavy, lethargic, and dull; dreams are unreal and confused because the worms inside shake the five zang organs. Therefore, take Xiaochong Xi Wan (Fine Pills for Eliminating Worms) to kill intestinal worms.
It is also said: Wine formula for eliminating the Three Corpses:
Ten jin of wheat flour, three dou of east-flowing spring water, soak it. In spring and summer, soak for two to three days; in autumn and winter, soak for four to five days. When the flour begins to ferment and rise, squeeze and filter to remove the dregs. Cook five sheng of rice, add it according to normal methods, grind finely, sift, and mix with ten jin of Fuling (Poria) and ten jin of Tianmendong (Asparagi Radix). Cook thoroughly, stir until blended. Then peel Shanglu Gen (Phytolaccae Radix), slice thinly five jin, place in a silk bag, and position under the fermentation vessel. Seal and smear the opening. After twenty days, remove the bag, pour the juice into wine, remove dregs, then add one sheng of powdered Da Dou Huang Juan (Fermented Soybean) prepared by boiling soybeans until yellow and sprouting, into the fermentation. Seal and smear again. After five days, remove. Take a pill the size of a jujube pit, three times daily. After twenty days, increase the dose to the size of a chicken egg yolk, three times daily. The Upper Corpse exits in one hundred days, the Middle Corpse in sixty days, and the Lower Corpse in thirty days. Their shape resembles humans, about three cun long. The Upper Corpse is black, the Middle Corpse is green, and the Lower Corpse is white. Wrap them in five-colored cloth and store in a bamboo box. Bury them beside east-flowing water the following night, resembling a tomb. Cry bitterly and invoke blessings using your own name, saying: "Humans are born from heaven, receiving spirit from Yang, and form/bone from Yin. Now I return spirit to heaven and form/bone to earth. I bid you eternal farewell in the boundless wilderness; I shall depart and soar above the Nine Heavens." Upon completion, sprinkle water on the body, change clothes, and return home without looking back. For three days, one may feel melancholy, as if losing soul and spirit; after this period, one will feel well.