Then all the Israelites—foreigners and native-born alike—along with the elders, officers, and judges, were divided into two groups. One group stood in front of Mount Gerizim, the other in front of Mount Ebal. Each group faced the other, and between them stood the Levitical priests carrying the Ark of the Lord’s Covenant. This was all done according to the commands that Moses, the servant of the Lord, had previously given for blessing the people of Israel.
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The account of this solemnity is very brief. An acquaintance with Deuteronomy 27 is evidently presupposed, and the three distinct acts of which the…

And all Israel, and their elders, etc. The third instance of obedience was placing all the tribes on Mount Gerizim and Mount Ebal to stand…

And all Israel, and their elders, and officers, and their
judges, stood on this side the ark, and on tha…

As soon as Joshua reached the mountains Ebal and Gerizim, without delay and regardless of the unsettled state of Israel or their enemies, he confir…
Albert Barnes
AlbertBarnes