New Revised Standard Version
and all the cities of King Sihon of the Amorites, who reigned in Heshbon, as far as the boundary of the Ammonites;

Contemporary English Version
and took in the towns that had belonged to Sihon, the Amorite king of Heshbon. Some of these towns were as far east as the Ammonite border.

New American Bible
with the rest of the cities of Sihon, king of the Amorites, who reigned in Heshbon, to the boundary of the Ammonites;

Douay-Rheims Bible
And all the cities of Sehon, king of the Amorrhites, who reigned in Hesebon, unto the borders of the children of Ammon.

And all the cities of Sehon, king of the Amorrhites, who reigned in Hesebon, unto the borders of the children of Ammon.

Numbers 21:24-27 And he was slain by them with the edge of the sword, and they possessed his land from the Arnon unto the Jeboc, and to the confines of the children of Ammon: for the borders of the Ammonites, were kept with a strong garrison. . . .