四分律比丘含注戒本 1.356

1.356

(Apart from the three robes, if one is separated from other robes, it is a duṣkṛta. Bhikṣuṇīs incur the same offense as bhikṣus. Those not committing an offense: when the Saṃgha has performed the karman; before the first light of dawn arises, if one holds the robe in hand, abandons the robe, or reaches the distance reached by a thrown stone; if one thought it was taken; if routes by water and land were cut off due to urgent hardship; or if there were robbers, vicious beasts, detention by the powerful, or dangers to life or the religious life—in such cases, even if one does not abandon the robe and does not reach the distance reached by a thrown stone, it is not an offense.)