Numbers 21:21-32
And Israel sent messengers to Sihon king of the Amorites, saying,
Nave's Topical Index—AKJV

Deuteronomy 2:24-35
Rise you up, take your journey, and pass over the river Arnon: behold, I have given into your hand Sihon the Amorite, king of Heshbon, and his land: begin to possess it, and contend with him in battle.
Nave's Topical Index—AKJV