Joshua
Joshua 22:10BSB·traditional attribution

And when they came to Geliloth near the Jordan in the land of Canaan, the Reubenites, the Gadites, and the half-tribe of Manasseh built an imposing altar there by the Jordan.

John Calvin Reformed @genevareformer

10. And when they came unto the borders, etc The history here is particularly deserving of notice, when the two tribes and half-tribe, intending to erect a memorial of common faith and fraternal concord, allowed themselves from inconsiderate zeal to adopt a method which was justly suspected by their brethren.

John Gill Reformed Baptist @doctorgill

And the children of Israel heard say,.... Those that dwelt in the land of Canaan, for otherwise, as before observed, the two tribes and a half on the other side Jordan were Israelites also; and this is a further proof that the altar was built on their side, or those in the land of Canaan would have known of the building of it, and have...

Jamieson-Fausset-Brown Reformed @jfbcommentary

THEY BUILD THE ALTAR OF TESTIMONY ON THEIR JOURNEY. (Jos 22:10) when they came unto the borders of Jordan, that are in the land of Canaan, the children of Reuben . . . built there an altar by Jordan--This altar was probably an immense pile of stones and earth.