17:1-9 All the cattle killed by the Israelites, while in the wilderness, were to be presented before the door of the tabernacle, and the flesh to be returned to the offerer, to be eaten as a peace-offering, according to the law. When they entered Canaan, this only continued in respect of sacrifices. The spiritual sacrifices we are now to offer, are not confined to any one place. We have now no temple or altar that sanctifies the gift; nor does the gospel unity rest only in one place, but in one heart, and the unity of the Spirit. Christ is our Altar, and the true Tabernacle; in him God dwells among men. It is in him that our sacrifices are acceptable to God, and in him only. To set up other mediators, or other altars, or other expiatory sacrifices, is, in effect, to set up other gods. And though God will graciously accept our family offerings, we must not therefore neglect attending at the tabernacle.
5. To the end that the children of Israel may bring their sacrifices, which they offer in the open field—"They" is supposed by some commentators to refer to the Egyptians, so that the verse will stand thus: "the children of Israel may bring their sacrifices which they (the Egyptians) offer in the open field." The law is thought to have been directed against those whose Egyptian habits led them to imitate this idolatrous practice.