Joshua 13:10

And all the cities of Sihon, king of the Amorites, who reigned in Heshbon, even to the bound of the sons of Ammon;

Numbers 21:24-26

And Israel will smite him with the mouth of the sword, and he will possess his land from Arnon to Jabbok, even to the sons of Ammon: for the boundary of the sons of Ammon was strong.

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