Deuteronomy 13:17-18

17And thou shalt not let anything cleave to thy hand of the devoted thing; that Jehovah may turn from the fierceness of his anger, and shew thee mercy, and have compassion upon thee, and multiply thee, as he hath sworn unto thy fathers; 18when thou hearkenest to the voice of Jehovah thy 1God, to keep all his commandments which I command thee this day, that thou mayest do what is right in the eyes of Jehovah thy 2God.