An altar, not for burnt-offering, nor for sacrifice - Because this would have been in flat opposition to the law, Leviticus 17:8, Leviticus 17:9; Deuteronomy 12:4-6, Deuteronomy 12:10, Deuteronomy 12:11, Deuteronomy 12:13, Deuteronomy 12:14, which most positively forbade any sacrifice or offering to be made in any other place than that one which the Lord should choose. Therefore the altar built by the Reubenites, etc., was for no religious purpose, but merely to serve as a testimony that they were one people with those on the west of Jordan, having the same religious and civil constitution, and bound by the same interests to keep that constitution inviolate.

Therefore we said,.... One to another, in order to prevent the apostasy of our children from God, their departure from his worship, and going into idolatry:

let us now prepare to build us an altar; get materials ready, and set about it instantly, without any delay, while the thing dwells upon our minds:

not for burnt offering, nor for sacrifice; not for offerings of any kind required by the law, neither for sin offerings nor trespass offerings, nor any other not named.

"So we thought, we will make ourselves to build an altar (an expression derived from the language of ordinary life, for 'we will build ourselves an altar'), not for burnt-offerings and slain-offerings; but it shall be a witness between us and you, and between our generations after us, that we may perform the service of Jehovah before His face (i.e., before the tabernacle in which Jehovah was enthroned), with our burnt-offerings, slain-offerings, and peace-offerings," - in order, as they repeat in Joshua 22:27 from Joshua 22:24, Joshua 22:25, that they might not be denied a part in Jehovah in time to come. For if it should so happen in time to come, that this should be said to them and to their descendants, they would say (or reply), "Behold the copy of the altar of Jehovah, which our fathers made, not for burnt-offerings," etc. (Joshua 22:28, as in Joshua 22:26, Joshua 22:27). For this reason they had built the altar according to the pattern of the altar before the tabernacle, and that not in their own land, but on the western side of the Jordan, where the dwelling-place of Jehovah was standing, as a witness that they worshipped one and the same God with the tribes on this side.

Therefore we said, Let us now prepare to build us an altar, not for burnt offering, nor for sacrifice:

22:21-29 The tribes took the reproofs of their brethren in good part. With solemnity and meekness they proceeded to give all the satisfaction in their power. Reverence of God is expressed in the form of their appeal. This brief confession of faith would remove their brethren's suspicion that they intended to worship other gods. Let us always speak of God with seriousness, and mention his name with a solemn pause. Those who make appeals to Heaven with a careless God knows, take his name in vain: it is very unlike this. They express great confidence of their own uprightness in the matter of their appeal. God knows it, for he is perfectly acquainted with the thoughts and intents of the heart. In every thing we do in religion, it highly concerns us to approve ourselves to God, remembering that he knows the heart. And if our sincerity be known to God, we should study likewise to let others know it by its fruits, especially those who, though they mistake us, show zeal for the glory of God. They disdained the design of which they were suspected to be guilty, and fully explained their true intent in building this altar. Those who have found the comfort and benefit of God's ordinances, cannot but desire to preserve them to their seed, and to use all possible care that their children may be looked upon as having a part in him. Christ is the great Altar that sanctifies every gift; the best evidence of our interest in him is the work of his Spirit in our hearts.