Leviticus 19:10

19:10 You must not pick your vineyard bare, and you must not gather up the fallen grapes of your vineyard. You must leave them for the poor and the foreigner. I am the Lord your God.

Leviticus 23:22

23:22 When you gather in the harvest of your land, you must not completely harvest the corner of your field, and you must not gather up the gleanings of your harvest. You must leave them for the poor and the foreigner. I am the Lord your God.’”

Leviticus 26:43

26:43 The land will be abandoned by them in order that it may make up for its Sabbaths while it is made desolate without them, and they will make up for their iniquity because they have rejected my regulations and have abhorred my statutes.