Deuteronomy 27:13

27:13 And these other tribes must stand for the curse on Mount Ebal: Reuben, Gad, Asher, Zebulun, Dan, and Naphtali.

Deuteronomy 29:8

29:8 Then we took their land and gave it as an inheritance to Reuben, Gad, and half the tribe of Manasseh.