Let no one deny the hireling the wage he is owed, since we too are hirelings of our God, and from him we look forward to the reward of our labor. And if you indeed, whatever type of businessman you are, deny your hireling a monetary payment that is a perishable trifle, you shall be denied the reward of heaven that has been promised. You shall not defraud, as the law says, the hireling of his pay.
[AD 397] Ambrose of Milan on Leviticus 19:13