Joshua 13:10

and all the cities of Sihon king of the Amorites, who reigned in Heshbon, unto the border of the children of Ammon;

Numbers 21:24-26

And 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.

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