1 Chronicles 12:8, 37-38

Part of the people of Gad joined David at his stronghold in the desert. They were brave warriors trained for war and skilled with shields and spears. They were as fierce as lions and as fast as gazelles over the hills.

There were one hundred twenty thousand soldiers from the east side of the Jordan River from the people of Reuben, Gad, and East Manasseh. They had every kind of weapon. All these fighting men were ready to go to war. They came to Hebron fully agreed to make David king of all Israel. All the other Israelites also agreed to make David king.