Judges 11:30
And Jephthah vowed a vow unto Jehovah, and said, If thou wilt indeed deliver the children of Ammon into my hand,
Genesis 28:20
And Jacob vowed a vow, saying, If God will be with me, and will keep me in this way that I go, and will give me bread to eat, and raiment to put on,
1 Samuel 1:11
And she vowed a vow, and said, O Jehovah of hosts, if thou wilt indeed look on the affliction of thy handmaid, and remember me, and not forget thy handmaid, but wilt give unto thy handmaid a man-child, then I will give him unto Jehovah all the days of his life, and there shall no razor come upon his head.
Numbers 30:2-16
When a man voweth a vow unto Jehovah, or sweareth an oath to bind his soul with a bond, he shall not break his word; he shall do according to all that proceedeth out of his mouth.
Ecclesiastes 5:1-2
Keep thy foot when thou goest to the house of God; for to draw nigh to hear is better than to give the sacrifice of fools: for they know not that they do evil.
Ecclesiastes 5:4-5
When thou vowest a vow unto God, defer not to pay it; for he hath no pleasure in fools: pay that which thou vowest.