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.

3, 4. What man … killeth an ox—The Israelites, like other people living in the desert, would not make much use of animal food; and when they did kill a lamb or a kid for food, it would almost always be, as in Abraham's entertainment of the angels [Ge 18:7], an occasion of a feast, to be eaten in company. This was what was done with the peace offerings, and accordingly it is here enacted, that the same course shall be followed in slaughtering the animals as in the case of those offerings, namely, that they should be killed publicly, and after being devoted to God, partaken of by the offerers. This law, it is obvious, could only be observable in the wilderness while the people were encamped within an accessible distance from the tabernacle. The reason for it is to be found in the strong addictedness of the Israelites to idolatry at the time of their departure from Egypt; and as it would have been easy for any by killing an animal to sacrifice privately to a favorite object of worship, a strict prohibition was made against their slaughtering at home. (See on [43]De 12:15).