Deuteronomy 24:21

When you gather the grapes of your vineyard, you shall not glean it afterward; it shall be for the stranger, the fatherless, and the widow.

Surrounding context

24:20 When you beat your olive trees, you shall not go over the boughs again; it shall be for the stranger, the fatherless, and the widow.

24:21 When you gather the grapes of your vineyard, you shall not glean it afterward; it shall be for the stranger, the fatherless, and the widow.

24:22 And you shall remember that you were a slave in the land of Egypt; therefore I command you to do this thing.

Translation and sources