When you make a vow to God, do not delay to fulfill it. He has no pleasure in fools; fulfill your vow. (NIV)
When you vow a vow or make a pledge to God, do not put off paying it; for God has no pleasure in fools (those who witlessly mock Him). Pay what you vow. [Ps. 50:14; 66:13, 14; 76:11.] (AMP)
When thou vowest a vow unto God, defer not to pay it; for he hath no pleasure in fools: pay that which thou hast vowed. (KJV)