四分律刪繁補闕行事鈔 2.428

2.428

四無命難。謂為怨賊、非人、惡獸，斷命緣者，得犯前戒。若是性戒，一向不開；豈得殺他誑他，而自活命。唯淫一戒，開與境合，三時無染。以不損境。餘則唯制。文云：我為諸弟子結戒已，寧死不犯。若論遮戒，有開、不開。道力既成，至死不毀，如草繫海板等例（出《大莊嚴論》）。餘志弱者，命梵二難，開下三篇；以上二篇是梵行本故。

Fourth: being free from mortal danger. That is to say, if inimical bandits, non-humans, or ferocious beasts cut off one's life conditions, one may violate the former precepts. If it is a natural precept, it is strictly never allowed; how could one kill others or deceive others to preserve one's own life? Only the single precept against sexual misconduct is allowed [when coerced into] joining with an object, provided that across the three times there is no lustful defilement, because it does not harm the object. As for the rest, there is strictly prohibition. The text says: After I have formulated the precepts for the disciples, [they should] rather die than violate them. If one considers prohibitory precepts, there are allowances and prohibitions. When the power of the Path is already accomplished, one will not break them even unto death, as in the examples of the grass-bound [bhikṣu] and the sea plank (found in the *Kalpanāmaṇḍitikā*). For others whose resolve is weak, under the two dangers of life and celibacy, the lower three classes are allowed; because the upper two classes are the root of celibacy.