四分律比丘戒本 1.p50

1.p50

If two householders or their wives shall have collected money to buy a robe to give to a particular monk, and if that monk before receiving it, and at his own invitation, go to the residences of these householders, and speak thus: “Excellent Sirs! I pray you purchase such and such pieces of cloth for me, because they will together make me one beautiful robe!” if he obtain his request, it is nissagiya pācittiya.