Deuteronomy 24:15
At his day thou shalt give him his hire, neither shall the sun go down upon it; for he is poor, and setteth his heart upon it: lest he cry against thee unto the LORD, and it be sin unto thee. At his day thou shalt give him his hire, neither shall the sun go down upon it; for he is poor, and setteth his heart upon it: lest he cry against thee unto the LORD, and it be sin unto thee.
An employer must give a poor and needy hired worker his hire on the day the wages are due, before the sun goes down, without keeping the pay overnight, because he is poor and depends on it and sets his heart upon it. The duty is to pay on the agreed day when the work is done, promptly and without delay. This requirement belongs to fair and compassionate treatment of workers, and it applies alike to a fellow Israelite or brother and to a stranger, foreigner, or sojourner living in the land.
The command requires not only prompt payment but full and fair payment of all that was earned, without keeping back hard-earned money. Workers must not be paid less than their labor is worth, and advantage must not be taken of circumstances to reduce their pay. Delaying or withholding wages in this way is oppression and injustice, a deviation from perfect fairness and strict integrity for selfish gain. It displeases God, who does not tolerate schemes that deprive people of what they are owed, and employers are accountable to Him for fair treatment.
If the deprived worker cries against the withholder unto the Lord, that cry brings sin and guilt upon the employer. This is especially serious when the worker is poor and has no power to appeal. Gaining wealth by exploiting people who have less money or less skill is condemned, even to the point of leaving them destitute. Pressuring a conscientious worker, or one connected with religious work, to accept too little is unjust, and money so withheld from a poor worker's proper pay is wrong even when it is put toward God's cause.
By the same principle of giving what is due, a brother who has labored for God's cause but has become too weak to work must not be dismissed to fend for himself, but must be given enough to support him as a member of God's family. Those who employ laborers, such as gatherers of harvest, must pay promptly and justly as those acting under God's eye and whose actions are wrought in God. By that same principle of rendering due, indulgence of appetite or passion that weakens physical and mental powers defrauds the body and soul, which are God's property.