(36) Aroer.--According to Conder, "the ruin 'Ar 'Air, on the north bank of Wady Mojib." (But he makes the Aroer of Numbers 32:34 a different place, and marks it as unknown. Why?)

The city that is by the river.--The description suggests Rabbath-ammon, but this cannot be referred to here.

Verse 36. - Aroer, one of the Amorite cities, on the right bank of the river Arnon (cf. Joshua 12:2; Joshua 13:16). On the Moabite Stone, King Mesha says, "I built Aroer;" but this can only mean that, after some temporary condition of decay or ruin, he rebuilt it. On the borders of the northern side of the Wady Mojeb, there are heaps of ruins bearing the name of Ara'ir, which probably mark the site of this ancient town. There was another Aroer, belonging at a later period to the tribe of Gad, and opposite to Rabba, the chief city of the Ammonites (Joshua 13:25; 2 Samuel 24:5); and still another in the south of Judah (1 Samuel 30:28), probably in what is now known as the Wady A'rarah. The city that is by the river; properly, in the river or wady; i.e. At, the capital of Moab, which was in the valley of the Arnon, and which is mentioned here as marking the exclusive limit of the country that was captured. The word rendered "river" (נַחַל) is used of the valley or ravine (Arabic, wady) through which a stream flows, as well as of the stream itself (cf. Genesis 26:19; Numbers 24:6, etc.). Ar is elsewhere called Ar of Moab (Isaiah 15:1). Even unto Gilead, i.e. Mount Gilead, which rises to the north of the Jabbok (hod. Zerka).

2:24-37 God tried his people, by forbidding them to meddle with the rich countries of Moab and Ammon. He gives them possession of the country of the Amorites. If we keep from what God forbids, we shall not lose by our obedience. The earth is the Lord's and the fulness thereof; and he gives it to whom he pleases; but when there is no express direction, none can plead his grant for such proceedings. Though God assured the Israelites that the land should be their own, yet they must contend with the enemy. What God gives we must endeavour to get. What a new world did Israel now come into! Much more joyful will the change be, which holy souls will experience, when they remove out of the wilderness of this world to the better country, that is, the heavenly, to the city that has foundations. Let us, by reflecting upon God's dealings with his people Israel, be led to meditate upon our years spent in vanity, through our transgressions. But happy are those whom Jesus has delivered from the wrath to come. To whom he hath given the earnest of his Spirit in their hearts. Their inheritance cannot be affected by revolutions of kingdoms, or changes in earthly possessions.From Aroer, which is by the brink of the river Arnon.... Upon the border of Moab, and the principal city of it; see Jeremiah 48:19.

and from the city that is by the river; or even the city that is in the midst of the river, the city Aroer, which seems to be meant; see Joshua 12:2. This river is afterwards called the river of Gad, 2 Samuel 24:5 in the midst of it Aroer was, perhaps because it was possessed by the tribe of Gad:

even unto Gilead; Mount Gilead and the country adjacent to it, which belonged to Og king of Bashan:

there was not one city too strong for us; that could hold out against them, when attacked and besieged by them, but presently surrendered:

the Lord our God delivered all unto us; Moses ascribes all the victories and success they had unto the Lord, not to their own might and power, but to the power of God with them, and his blessing on them.