The tribes of Reuben and Gad had a lot of livestock. When they saw how suitable the land of Jazer and Gilead was for cattle,

"This region which the LORD has helped the Israelites occupy---the towns of Ataroth, Dibon, Jazer, Nimrah, Heshbon, Elealeh, Sibmah, Nebo, and Beon---is good land for livestock, and we have so much livestock.