Deuteronomy 2:34

And we took all his cities at that time
As Heshbon, and others mentioned in ( Numbers 21:25 Numbers 21:30 Numbers 21:32 ) ( Numbers 32:3 Numbers 32:34-38 ) ,

and utterly destroyed the men, and the women, and the little ones
of every city, we left none to remain;
for the Amorites were one of the seven nations who were devoted to destruction, the measure of whose iniquity was now full, and therefore vengeance was taken.