Your Word Is Your Vow And You Must Keep It, Deuteronomy 23-24.

Deuteronomy 24:14-15 Deuteronomy 23:21-23 “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. Each 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. “When you make a vow to the Lord your God, you shall not delay to pay it; for the Lord your God will surely require it of you, and it would be sin to you. But if you abstain from vowing, it shall not be sin to you. That which has gone from your lips you shall keep and perform, for you voluntarily vowed to the Lord your God what you have promised with your mouth.