Deuteronomy 24
14 Ref You shall not oppress a hired servant who is poor and needy, whether he be of your brothers, or of your foreigners who are in your land within your gates:
15 Ref in his day you shall give him his hire, neither shall the sun go down on it; for he is poor, and sets his heart on it: lest he cry against you to Yahweh, and it be sin to you.