When thou shall vow a vow to LORD thy God, thou shall not be slack to pay it. For LORD thy God will surely require it of thee, and it would be sin in thee.
That which has gone out of thy lips thou shall observe and do, according as thou have vowed to LORD thy God, a freewill-offering, which thou have promised with thy mouth.
And the sons of Israel did not smite them, because the rulers of the congregation had sworn to them by LORD, the God of Israel. And all the congregation murmured against the rulers.