The rules by which vows were to be legally regulated, so far as their objects and their discharge were concerned, has been already laid down in Lev; but the chapter before us contains instructions with reference to the force of vows and renunciations. These are so far in place in connection with the general rules of sacrifice, that vows related for the most part to the presentation of sacrifices; and even vows of renunciation partook of the character of worship. The instructions in question were addressed (Num 30:1) to "the heads of the tribes," because they entered into the sphere of civil rights, namely, into that of family life.