Original Verse:
Numbers Chapter 21 Verse 24And Israel smote him with the edge of the sword, and possessed his land from the Arnon unto the Jabbok, even unto the children of Ammon; for the border of the children of Ammon was strong.

Reference Verses:
Numbers Chapter 32 Verse 1Now the children of Reuben and the children of Gad had a very great multitude of cattle: and when they saw the land of Jazer, and the land of Gilead, that, behold, the place was a place for cattle;
Deuteronomy Chapter 3 Verse 3So Jehovah our God delivered into our hand Og also, the king of Bashan, and all his people: and we smote him until none was left to him remaining.
Deuteronomy Chapter 3 Verse 16And unto the Reubenites and unto the Gadites I gave from Gilead even unto the valley of the Arnon, the middle of the valley, and the border [thereof], even unto the river Jabbok, which is the border of the children of Ammon;
Deuteronomy Chapter 2 Verse 12The Horites also dwelt in Seir aforetime, but the children of Esau succeeded them; and they destroyed them from before them, and dwelt in their stead; as Israel did unto the land of his possession, which Jehovah gave unto them.)
Amos Chapter 2 Verse 9Yet destroyed I the Amorite before them, whose height was like the height of the cedars, and he was strong as the oaks; yet I destroyed his fruit from above, and his roots from beneath.
Deuteronomy Chapter 2 Verse 37only to the land of the children of Ammon thou camest not near; all the side of the river Jabbok, and the cities of the hill-country, and wheresoever Jehovah our God forbade us.
Judges Chapter 11 Verse 13And the king of the children of Ammon answered unto the messengers of Jephthah, Because Israel took away my land, when he came up out of Egypt, from the Arnon even unto the Jabbok, and unto the Jordan: now therefore restore those [lands] again peaceably.