Deuteronomy 24:14-15

14“You shall not oppress a hired servant who is poor and needy, whether one of your brethren or one of the aliens who is in your land within your gates.

15Each day you shall give him his wages, and not let the sun go down on it, for he is poor and has set his heart on it; lest he cry out against you to the Lord, and it be sin to you.