Leviticus 23:21-22

21On that same day you are to proclaim a sacred assembly, and you must not do any regular work. This is to be a permanent statute wherever you live for the generations to come.

22When you reap the harvest of your land, do not reap all the way to the edges of your field or gather the gleanings of your harvest. Leave them for the poor and the foreign resident. I am the LORD your God.’”