孙真人云∶大寒与大热，且莫贪色欲。
书云∶凡大风大雨大雾、雷电霹雳、日月薄蚀、虹 地动、天地昏冥，日月星辰之下，神庙
寺观之中，井灶围厕之侧，环墓尸柩之傍，皆所不可犯淫，则损人寿命。若此时受胎，非止百倍
损于父母，生子不仁不孝，多疾不寿。
《保命诀》云∶人勿犯长命，及诸神降日犯淫者促寿。朔日减一纪，望日减十年，晦日减一
年。初八日上弦，二十三日下弦，三元减五年。庚申甲子，本命减一年。正月初三日万神皆会，
十四、十六日三宫降，二月二日万神会，四立日、二分日、二至日、二社日俱不可犯。三月初九
日牛鬼神降，犯者百日中恶。四月初四日万神善化，犯之失音。初八日善恶童子降，犯者血死。
五月三个五日、六日、七日为九毒日，犯者不过三年。十月初一日夜西天王降，犯之一年死。十
一月二十五日掠剩大夫降，犯之短命。十二月初七日夜，犯之恶病死。二十日天河相交行道，犯
之促寿。每月二十八日人神在阴，四月十日阴阳纯用事。以上日辰犯淫且不可，况婚姻乎？
按《庚申论》曰∶古人多尽天数，今人不终天年，何则？以其罔知避慎，肆情恣色，暗犯禁忌，阴司减其
龄算，能及百岁者，几何人哉？蜀主孟昶纳张丽华于观侧。一夕迅雷电火，张氏殒。道士李若冲
于上元夜，见殿上有朱履衣冠之士北面而立，廊下罗列罪人，有女人甚。若白其师唐洞卿。师曰∶
此张丽华也。昔宠幸于此，亵渎高真所致。由是观之，天地间禁忌不可犯也。
孙思邈曾说：在大寒和大热的时候，千万不要贪恋色欲。
医书说：凡是遇到大风、大雨、大雾、雷电霹雳、日月食、地震、天地昏暗之时，在日月星辰之下，神庙寺观之中，井灶厕所旁边，环绕坟墓尸体的近旁，都不可行房事，否则会损害人的寿命。如果在这些时候受孕，不仅对父母造成百倍损伤，生下的孩子也会不仁不孝，多病且短命。
《保命诀》说：人不要触犯“长命”日，以及在诸神降临的日子行房事会缩短寿命。初一（朔日）减一纪（十二年），十五（望日）减十年，月末（晦日）减一年。初八日上弦月，二十三天下弦月，三元日减五年。庚申日和甲子日，本命年减一年。正月初三日万神聚会，十四日和十六日三宫神降临，二月二日万神聚会，立春、立夏、立秋、立冬四立日，春分、秋分二分日，夏至、冬至二至日，春社、秋社二社日，都不可行房事。三月初九日牛鬼神降临，触犯者一百天内会得恶疾而死。四月初四日万神善化，触犯者会失音。初八日善恶童子降临，触犯者会因血证而死。五月中的初三、初六、初七为九毒日，触犯者活不过三年。十月初一日夜间西天王降临，触犯者一年内死亡。十一月二十五日掠剩大夫降临，触犯者短命。十二月初七日夜，触犯者会死于恶病。二十日天河相交行道，触犯者缩短寿命。每月二十八日人神在阴位，四月十日阴阳纯用事。以上日辰行房事尚且不可以，何况结婚呢？
按《庚申论》记载：古人大多能享尽天年，今人不能终其天寿，为什么呢？因为他们不知道躲避和谨慎，放纵情欲，暗中触犯禁忌，阴司减少他们的寿命计算，能活到百岁的人，有多少呢？蜀主孟昶在观侧纳张丽华为妃。一天夜里迅雷电火，张氏殒命。道士李若冲在上元夜，看见殿上有穿着红鞋、戴着帽子的士人面向北站立，廊下罗列着罪人，其中有一个女人非常丑陋。李若冲告诉他的师父唐洞卿。师父说：这是张丽华。昔日受宠于此，因亵渎高真所致。由此看来，天地间禁忌不可触犯啊。
Sun Simiao said: During periods of extreme cold and extreme heat, one must not indulge in sexual desires.
Medical texts state: Whenever there is strong wind, heavy rain, dense fog, thunder and lightning, solar or lunar eclipses, earthquakes, or when the sky and earth are darkened, one must not engage in sexual intercourse under the sun, moon, stars, within temples and monasteries, beside wells, stoves, and latrines, or near graves and corpses. Doing so will shorten one's lifespan. If conception occurs during these times, it will not only harm the parents a hundredfold, but the child born will be unkind and unfilial, prone to illness, and short-lived.
The *Baoming Jue* (Prescriptions for Preserving Life) states: One should not violate the "Longevity" days, nor engage in sexual intercourse on days when various deities descend, as this will shorten one's life. Violating the first day of the lunar month (Shuo) reduces life by one Ji (12 years); the fifteenth day (Wang) by ten years; the last day (Hui) by one year. The eighth day (First Quarter Moon) and the twenty-third day (Last Quarter Moon), as well as the Three Yuan days, reduce life by five years. Gengshen and Jiazi days reduce life by one year. On the third day of the first lunar month, all deities gather; on the fourteenth and sixteenth days, the Three Palaces deities descend; on the second day of the second lunar month, all deities gather. The Four Li (Start of Spring, Summer, Autumn, Winter) days, the two Equinox days, the two Solstice days, and the two She days (Spring and Autumn sacrifices) are all forbidden for sexual activity. On the ninth day of the third lunar month, the Ox Demon Gods descend; violating this leads to malignant illness and death within one hundred days. On the fourth day of the fourth lunar month, all deities undergo good transformation; violating this causes loss of voice. On the eighth day, the Good and Evil Child Deities descend; violating this leads to death from blood disorders. In the fifth lunar month, the third, sixth, and seventh days are the Nine Poison Days; violating this means one will not live beyond three years. On the night of the first day of the tenth lunar month, the Western Heavenly King descends; violating this leads to death within one year. On the twenty-fifth day of the eleventh lunar month, the Luesheng Dafu (Official of Surplus Snatching) descends; violating this results in a short life. On the night of the seventh day of the twelfth lunar month, violating this leads to death from malignant illness. On the twentieth day, the Heavenly River intersects for travel; violating this shortens life. On the twenty-eighth day of each month, the Human Spirit is in the Yin position; on the tenth day of the fourth lunar month, Yin and Yang are purely active. Engaging in sexual intercourse on the above-mentioned days and hours is already impermissible, let alone marriage.
According to the *Gengshen Lun*: Why did the ancients often enjoy their full natural lifespan, while modern people do not reach their natural end? It is because they do not know how to avoid and be cautious, indulging in lust and secretly violating taboos, causing the Yin Court to deduct their years of life. How many people can reach a hundred years old? Meng Chang, the ruler of Shu, took Zhang Lihua as a concubine beside a Daoist temple. One night, amidst thunder and lightning, Zhang died. The Daoist priest Li Ruochong saw, on the night of the Lantern Festival, scholars wearing red shoes and hats standing facing north in the hall, with sinners lined up in the corridor, including a very ugly woman. Li reported this to his master, Tang Dongqing. The master said: This is Zhang Lihua. Her past favor here resulted from her profanity towards the High Truths. From this, we see that the taboos of heaven and earth must not be violated.