“Then I commanded you [Reuben, Gad, and the half-tribe of Manasseh] at that time, saying, ‘The Lord your God has given you this land to possess; all you who are brave men shall cross over [the Jordan] armed before your brothers, the sons of Israel.

These [tribes] shall stand on Mount Ebal to pronounce the curse [for disobedience]: Reuben, Gad, Asher, Zebulun, Dan, and Naphtali.

Of Gad he said,

“Blessed is the one who enlarges Gad;
He lurks like a lioness,
And tears the arm and the crown of the head.