Deuteronomy 3:12 Halakhah

וְאֶת־הָאָ֧רֶץ הַזֹּ֛את יָרַ֖שְׁנוּ בָּעֵ֣ת הַהִ֑וא מֵעֲרֹעֵ֞ר אֲשֶׁר־עַל־נַ֣חַל אַרְנֹ֗ן וַחֲצִ֤י הַֽר־הַגִּלְעָד֙ וְעָרָ֔יו נָתַ֕תִּי לָרֻֽאוּבֵנִ֖י וְלַגָּדִֽי׃

And this land we took in possession at that time; from Aroer, which is by the valley of Arnon, and half the hill-country of Gilead, and the cities thereof, gave I unto the Reubenites and to the Gadites;