Kejadian 19:38

19:38 The younger daughter also gave birth to a son and named him Ben-Ammi. ¹  He is the ancestor of the Ammonites of today.

Ulangan 2:37

2:37 However, you did not approach the land of the Ammonites, the Wadi Jabbok, ²  the cities of the hill country, or any place else forbidden by the Lord our God.

Yosua 13:10

13:10 and all the cities of King Sihon of the Amorites who ruled in Heshbon, and ended at the Ammonite border.

¹ sn The name Ben-Ammi means “son of my people.” Like the account of Moab’s birth, this story is probably included in the narrative to portray the Ammonites, another perennial enemy of Israel, in a negative light.

² sn Wadi Jabbok. Now known as the Zerqa River, this is a major tributary of the Jordan that normally served as a boundary between Ammon and Gad (Deut 3:16).