Pratimokshasutra of the Sarvastivadins 1.37

1.37

「若比丘，從非親里居士、若居士婦乞衣得者，尼薩耆波夜提；除因緣。因緣者，奪衣、失衣、燒衣、漂衣，是名因緣。

"If a bhikṣu begs for a robe from an unrelated male householder or female householder and obtains it, it is a niḥsargika-prāyaścittika; except on special occasions. The special occasions are: having one's robe robbed, having one's robe lost, having one's robe burned, or having one's robe washed away by water; these are called special occasions.