Is the iniquity of Peor too little - See this history, Num 25:3 (note), etc., and the notes there. Phinehas takes it for granted that this altar was built in opposition to the altar of God erected by Moses, and that they intended to have a separate service, priesthood, etc., which would be rebellion against God, and bring down his curse on them and their posterity; and, in order to show that God is jealous of his glory, he refers to the business of Baal Peor, which took place in that very country they were now about to possess, the destructive consequences of which he, through his zeal for the glory of God, was the means of preventing.

Notwithstanding, if the land of your possession be unclean,.... That is, if it was judged to be so by them, because not cleansed from the sins of the former inhabitants of it by sacrifice, or because there was no altar in it to offer up sacrifice for the expiation of sin:

then pass ye over unto the land of the possession of the Lord,

wherein the Lord's tabernacle dwelleth; if you repent of the choice you have made of a country to dwell in, quit it, and come over into the land of Canaan, which the Lord has taken possession of, and residence in, and where his tabernacle is fixed, the place of his presence and worship, and where an altar is erected to sacrifice upon:

and take possession among us; they were willing to quit possession of their own, and make room for them in each of their tribes, and even though they straitened themselves, and parted with much of their estates, rather than they should make a schism, or go into idolatrous practices; which was a brave, noble, spirit indeed, and showed their great concern for the honour and glory of God, and his worship, and their love to their brethren, and affectionate regard for their spiritual welfare, above their own private, personal, and temporal good:

but rebel not against the Lord: the Word of the Lord, as the Targum, either Christ the essential Word, the Angel of Jehovah's presence, or his word of command:

nor rebel against us; by breaking off from us, and setting up another religion or form of worship:

in building you an altar beside the altar of the Lord our God: which ought to be common to both, and no other to be set up against it, or used beside it.

CONTENTION THEREUPON. (Jos. 22:11-29)

and the children of Israel heard say--Fame speedily spread intelligence of what the trans-jordanic tribes had done. The act being suspected of some idolatrous design, the tribes rose in a mass, and repairing to the tabernacle at Shiloh, resolved to declare war against the two tribes and a half as apostates from God. On calmer and more mature consideration, however, they determined, in the first instance, to send a deputation consisting of the son of the high priest, and ten eminent persons from each tribe, to make inquiry into this rumored rebellion against God (Deu 13:13-15). The quality of the deputies evinced the deep solicitude that was felt on the occasion to maintain the purity of the divine worship throughout Israel. In the presumptive belief that the two tribes and a half had really built an altar, the deputies expressed astonishment at their so soon falling into such a heinous crime as that of violating the unity of divine worship (Exo 20:24; Lev 17:8-9; Deu 12:5-13). They reminded their eastern brethren of the disastrous consequences that were entailed on the nation at large by the apostasy at Peor and by the sin of Achan, and finally exhorted them, if they felt the want of the tabernacle and altar and repented of their rash choice in preferring worldly advantages to religious privileges, to remove to the western side of the Jordan, where all the tribes would form a united and obedient community of worshippers.