vow
nounA solemn promisemade to God, or by a pagan to his deity. The Roman generals when they went to war, sometimes made a vow that they would build a temple to some favorite deity, if he would give them victory. A vow is a promise of something to be given or done hereafter. A person is constituted a religious by taking three vows, of chastity, of poverty, and of obedience. Among the Isrealites, the vows of children were not binding, unless ratified by the express or tacit consent of their father. Numbers 30:2-15.