en_tn/num/21/23.md

to pass through their border

"to cross over their border." Here "their" refers to the Amorites.

Jahaz

This is the name of a place. (See: rc://en/ta/man/translate/translate-names)

he fought against Israel

Here "he" refers to King Sihon who represents himself and his army. AT: "they fought against the Israelites" (See: rc://en/ta/man/translate/figs-synecdoche)