When you reap the harvest in your field and overlook a sheaf in the field, do not turn back to get it; it shall go to the stranger, the fatherless, and the widow – in order that YHWH your God may bless you in all your undertakings.

When you beat down the fruit of your olive trees, do not go over them again; that shall go to the stranger, the fatherless, and the widow.
When you gather the grapes of your vineyard, do not pick it over again; that shall go to the stranger, the fatherless, and the widow.

Deuteronomy 24, 19-21