(24) Pass over . . . Arnon.--The territory from Arnon northward to Jabbok had been taken from Moab by the Amorites, and was to be possessed by Israel. (See on Numbers 21:24.)

Verses 24-37. - CONQUEST OF THE KINGDOM OF SIHON. Sihon and his people were Amorites, who had settled on the east of the Jordan in Gilead. But though not included in the original promise to Abraham, God had assigned this territory to the Israelites; and, therefore, he commanded the people under Moses to cross the Amen, and take the first step towards possessing the Promised Land, by assailing Sihon, King of Heshbon, assuring them that from that day he would "put the dread and fear of them upon all nations under the whole heaven," that is, all nations, wherever placed, to whom the fame of the Israelites should come (comp. Exodus 23:27; Deuteronomy 11:16), so that on hearing thereof, they should tremble and writhe as in pain (וְחָלוּ, comp. Isaiah 13:8). Moses, however, in the first instance, sent a message of peace to Sihon, proposing to pass through his territory on the same terms as he had made with the Moabites and Edomites, traveling by the highway, and paying for such provisions as his followers required. But this Sihon refused, and came out against Israel, with all his people, to battle. The issue was that he was utterly discomfited; all his towns were captured, he and all his people utterly destroyed, and the cattle and spoil of the whole country taken for booty. Israel thus became possessed of that entire territory, though it did not lie within the bounds of the land promised by God to Abraham, which was the reason, probably, why Moses made overtures of peace to Sihon, and would have passed through his country amicably, had he been permitted; but comp. Deuteronomy 20:10.

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.Rise ye up, take your journey, and pass over the river Arnon,.... Which was on the border of Moab, and divided between Moab and the Amorites, Numbers 21:13.

behold, I have given into thy hand Sihon, the Amorite, king of Heshbon, and his land; that is, he had determined to give it to the Israelites, for as yet it was not actually given; of this king, and the place he was king of; see Gill on Numbers 21:21, Numbers 21:26 begin to possess it, and contend with him in battle; provoke him to war, fight with him, take his land from him, and enter upon the possession of it, hereby assuring of victory.