VOW (נָדַר, H5623, to vow, a vow; אָסַר, H673, bond, binding obligation; εὐχή, G2376, a prayer to God; also a vow). The vow is a pledge or oath of a religious character, and a transaction between man and God, in which man dedicates himself or his service or something valuable to God. A common feature in ancient religions, it is also a frequent exercise in religious life among the Israelites. Though generally a promise made in expectation of a divine favor eagerly sought, there were also vows of voluntarily imposed self-discipline for the achievement of character, and of self-dedication for the attainment of certain goals.
Jesus rebuked as reprehensible the payment of vows when used as occasion for escape from obligation to parents (
International Standard Bible Encyclopedia (1915)