19 You must not charge interest on a loan to your fellow Israelite, whether on money, food, or anything else that has been loaned with interest. 20 You may lend with interest to a foreigner, but not to your fellow Israelite; if you keep this command the Lord your God will bless you in all you undertake in the land you are about to enter to possess. 21 When you make a vow to the Lord your God you must not delay in fulfilling it, for otherwise he will surely hold you accountable as a sinner. 22 If you refrain from making a vow, it will not be sinful. 23 Whatever you vow, you must be careful to do what you have promised, such as what you have vowed to the Lord your God as a freewill offering.

2 (5:1) Do not be rash with your mouth or hasty in your heart to bring up a matter before God, for God is in heaven and you are on earth! Therefore, let your words be few. 3 Just as dreams come when there are many cares, so the rash vow of a fool occurs when there are many words. 4 When you make a vow to God, do not delay in paying it. For God takes no pleasure in fools: Pay what you vow! 5 It is better for you not to vow than to vow and not pay it. 6 Do not let your mouth cause you to sin, and do not tell the priest, “It was a mistake!” Why make God angry at you so that he would destroy the work of your hands?