Moses
Deuteronomy 2:26ESV·traditional attribution

“So I sent messengers from the wilderness of Kedemoth to Sihon the king of Heshbon, with words of peace, saying,

Matthew Henry Presbyterian @wholebiblehenry

God having tried the self-denial of his people in forbidding them to meddle with the Moabites and Ammonites, and they having quietly passed by those rich countries, and, though superior in number, not made any attack upon them, here he recompenses them for their obedience by giving them possession of the country of Sihon king of the Amorites.

Commenting on Deuteronomy 2:24-37

John Gill Reformed Baptist @doctorgill

And I sent messengers out of the wilderness of Kedemoth,.... A city in the tribe of Reuben, and given by them to the Levites in later times, having been taken from the Amorites with others; near this lay a wilderness, which took its name from it, and seems to be the same with Jeshimon, Num 21:20.

Keil & Delitzsch Lutheran @keilanddelitzsch

Deu 2:26-30 If Moses, notwithstanding this, sent messengers to king Sihon with words of peace (Deu 2:26.; cf. Num 21:21.), this was done to show the king of the Amorites, that it was through his own fault that his kingdom and lands and life were lost.

Commenting on Deuteronomy 2:26-30