Numbers 21:28

Israel took all these cities. Israel lived in all the cities of the Amorites, in Heshbon, and in all its villages.

For Heshbon was the city of Sihon the king of the Amorites, who had fought against the former king of Moab, and taken all his land out of his hand, even to the Arnon.

Therefore those who speak in proverbs say,

“Come to Heshbon.

Let the city of Sihon be built and established;

Woe to you, Moab!

You are undone, people of Chemosh!

He has given his sons as fugitives,

and his daughters into captivity,

to Sihon king of the Amorites.

We have shot at them.

Heshbon has perished even to Dibon.

We have laid waste even to Nophah,

Which reaches to Medeba.”

Thus Israel lived in the land of the Amorites.