The vow-offering appears to have been a peace-offering vowed upon a certain condition; the voluntary-offering, one offered as the simple tribute of…

Be a vow or a voluntary offering—The vow and the voluntary offering which constitute the second class of peace offerings …

But if the sacrifice of his offering. I have observed a little earlier that it is not a conditional but a simple vow that is meant here. I…

But if the sacrifice of his offering be a vow
Be on account of a vow made, as, that if he was favoured with such and…

Regarding the peace-offerings, God allowed them more freedom in expressing their sense of mercy than in expressing their sense of sin, so that thei…