Numbers 6:13

13.And this is the law of the Nazarites. Moses now shews at last how, after the full period of the vow, the Nazarites must return to their common life. And, first, he commands them to place themselves at the door of the tabernacle; then, to offer there a lamb without spot for a burnt-offering, a ewe-lamb for a sin-offering, and a ram for peace-offerings, with cakes of fine flour mingled with oil, wafers, and unleavened bread, and meat-offering, and drink-offerings. As to the peace-offering, because it was presented in thanksgiving, it was by no means inappropriate; nor the burnt-offering either, because they might justly congratulate themselves, and celebrate God’s goodness, when they had discharged their pious duty, since God had vouchsafed them no ordinary honor. But what was meant by the sin-offering may be questioned, since expiation was needless for the pure and holy. Here we clearly perceive, that however cheerfully and earnestly men endeavor to offer themselves altogether to God, yet they never attain to the goal of perfection, nor arrive at what they desire, but are always exposed to God’s judgment, unless He should pardon their sins. Whence it appears how base is the Papists’ folly, when they dream of appeasing God by works of supererogation. For, if ever any supererogation were pleasing to God, the holiness of the Nazarites, being testified to by the Law, was worthy of this honor; yet God, when the work is complete, commands them to confess their guilt, and suffers not this service to intrude into the place of merit, but requires of them a sacrifice, that they may borrow from elsewhere what belongs not to themselves, though they appear to be the most perfect of all men.