Numbers 21:31
And Israel dwelleth in the land of the Amorite,
Numbers 32:33-42
And Moses giveth to them, to the sons of Gad, and to the sons of Reuben, and to the half of the tribe of Manasseh son of Joseph, the kingdom of Sihon king of the Amorite, and the kingdom of Og king of Bashan, the land by its cities, in the borders, the cities of the land round about.
Deuteronomy 3:16-17
'And to the Reubenite and to the Gadite I have given from Gilead even unto the brook Arnon, the middle of the valley and the border, even unto Jabbok the brook, the border of the sons of Ammon,
Joshua 12:1-6
And these are kings of the land whom the sons of Israel have smitten, and possess their land, beyond the Jordan, at the sun-rising, from the brook Arnon unto mount Hermon, and all the plain eastward.
Joshua 13:8-12
with it the Reubenite, and the Gadite, have received their inheritance, which Moses hath given to them beyond the Jordan eastward, as Moses servant of Jehovah hath given to them;