Jamieson-Fausset-Brown on Numbers 32:34
And the children of Gad built--(See on Num 32:16).
Dibon--identified with Dheban, now in ruins, an hour's distance from the Arnon (Mojeb).
Ataroth (Hebrew, "crowns")--There are several towns so called in Scripture, but this one in the tribe of Gad has not been identified.
Aroer--now Arair, standing on a precipice on the north bank of the Arnon.
John Gill on Numbers 32:34
And the children of Gad built,.... Or rather repaired the walls and fortifications, and rebuilt houses which had been demolished in the wars with Sihon and Og; when the following places were taken by the Israelites:
Dibon, and Ataroth, and Aroer; the two first are mentioned in Numbers 32:3. Aroer was a city situated on the river Arnon, and was after this in the hands of the Moabites: Jerom says (q), it was showed in his day on the top of the mountain, upon the bank of the river Arnon, which flows into the Dead sea, Jeremiah 48:19.
(q) De loc. Heb. fol. 87. I.
John Calvin on Numbers 32:33–end
And Moses gave unto them. We must understand that Moses gave it in such sort, as that, relying on God's command, he laid down an inviolable law. For, although it is not expressly stated that God interposed His authority, still His subsequent approbation fully assures us of it. So also, although no mention is made of Eleazar and the elders, still it is certain that they were not passed over, but that they were united with him in the decision; especially since the case had been brought before them by the sons of Gad and Reuben, (ver. 2.) There is only an implied contrast between the old covenant which God had made with Abraham, and this new and special privilege, wherewith He condescended to e…
Read the whole note in the consoleKeil & Delitzsch on Numbers 32:34-36
The Gadites built, i.e., restored and fortified, the following places. Dibon, also called Dibon Gad, an hour's journey to the north of the central Arnon. Ataroth, probably preserved in the extensive ruins of Attarus, on Jebel Attarus, between el Krriath (Kureyat) and Makur, i.e., Machaerus (see Seetzen, ii. p. 342). Aroer, not the Aroer before Rabbah, which was allotted to the Gadites (Jos 13:25), as v. Raumer supposes; but the Aroer of Reuben in the centre of the valley of the Arnon (Jos 12:2; Jos 13:9, Jos 13:16), which is still to be seen in the ruins of Araayr, on the edge of the lofty rocky wall which bounds the Modjeb (Burckhardt, p. 633). Atroth Shophan: only mentioned here; situation…