佛說目連問戒律中五百輕重事經 1.156

1.156

問：「乞食長，得與人不？」答：「先無貪心取長，得施眾生。若無眾生，舉著樹頭，有眾生噉好。若無，明日還自受水取食。不得棄，以信施重故。所以還得自取者，以更無主故，如欝單越取食法。」

Question: "If there is an excess of almsfood, may he give it to others or not?"
Answer: "If he took the excess without prior greed, he may give it to living beings. If there are no living beings, he places it atop a tree; if living beings eat it, that is fine. If there are none, the next day he may again take it himself with water and eat it. He must not discard it, because the gift of faith is serious. The reason he may take it back himself is that it no longer has an owner, following the manner of taking food in Uttarakuru."