Deuteronomy 24:21

21 When you have gathered your grapes once, do not go back over the vines a second time; the grapes that are left are for the foreigners, orphans, and widows.

Deuteronomy 24:21 In-Context

19 "When you gather your crops and fail to bring in some of the grain that you have cut, do not go back for it; it is to be left for the foreigners, orphans, and widows, so that the Lord your God will bless you in everything you do.
20 When you have picked your olives once, do not go back and get those that are left; they are for the foreigners, orphans, and widows.
21 When you have gathered your grapes once, do not go back over the vines a second time; the grapes that are left are for the foreigners, orphans, and widows.
22 Never forget that you were slaves in Egypt; that is why I have given you this command.
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.