四分律比丘含注戒本 1.451

1.451

若不得衣，從所得衣價處，若自往，若遣使往，語言：「汝先遣使持衣價與某甲比丘，是比丘竟不得衣。汝還取，莫使失。」此是時。

If he does not obtain the robe, from the place where the robe-fund was obtained, he should either go himself or dispatch a messenger to go, saying: 'You previously sent a messenger with a robe-fund to give to bhikṣu so-and-so, but in the end this bhikṣu has not obtained the robe. Take it back; do not let it be lost.' This is the proper course."