Jamieson-Fausset-Brown on Joshua 22:21
Then the children of Reuben . . . answered--repudiating, in the strongest terms, the alleged crime, and deponing that so far from entertaining the intention imputed to them, their only object was to perpetuate the memory of their alliance with Israel [Jos 22:24-25], and their adherence to the worship of Israel's God [Jos 22:26-27].
Adam Clarke on Joshua 22:26
An altar, not for burnt-offering, nor for sacrifice - Because this would have been in flat opposition to the law, Lev 17:8, Lev 17:9; Deu 12:4-6, Deu 12:10, Deu 12:11, Deu 12:13, Deu 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.
John Gill on Joshua 22:26
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.
John Calvin on Joshua 22:21–end
Joshua 22:21-34
21. Then the children of Reuben and the children of Gad and the half tribe of Manasseh answered, and said unto the heads of the thousands of Israel,
21. Responderunt autem filii Ruben, et filii Gad, et dimidia tribus Manasse, loquutique sunt cum principibus millium Israel.
22. The LORD God of gods, the LORD God of gods, he knoweth, and Israel he shall know; if it be in rebellion, or if in transgression against the LORD, (save us not this day,)
22. Deus deorum Jehova, Deus deorum Jehova ipse novit, et Israel cognoscet, si per rebellionem, et si per prevaricationem in Jehovam, ne serves nos die hac.
23. That we have built us an altar to turn from following the LORD, or if…