Commentary for Deuteronomy 3:8

וַנִּקַּ֞ח בָּעֵ֤ת הַהִוא֙ אֶת־הָאָ֔רֶץ מִיַּ֗ד שְׁנֵי֙ מַלְכֵ֣י הָאֱמֹרִ֔י אֲשֶׁ֖ר בְּעֵ֣בֶר הַיַּרְדֵּ֑ן מִנַּ֥חַל אַרְנֹ֖ן עַד־הַ֥ר חֶרְמֽוֹן׃

And we took the land at that time out of the hand of the two kings of the Amorites that were beyond the Jordan, from the valley of Arnon unto mount Hermon—

Rashi on Deuteronomy