Deuteronomy 23:20-22

Young's Literal Translation

²⁰ To a stranger thou mayest lend in usury, and to thy brother thou dost not lend in usury, so that Jehovah thy God doth bless thee in every putting forth of thy hand on the land whither thou goest in to possess it.

²¹ `When thou vowest a vow to Jehovah thy God, thou dost not delay to complete it; for Jehovah thy God doth certainly require it from thee, and it hath been in thee -- sin.

²² `And when thou forbearest to vow, it is not in thee a sin.