Numbers 32:1-5

Now the sons of Reuben and the sons of Gad had an exceedingly large number of livestock. So when they saw the land of Jazer and the land of Gilead, that it was indeed a place suitable for livestock, the sons of Gad and the sons of Reuben came and spoke to Moses and to Eleazar the priest and to the leaders of the congregation, saying, “Ataroth, Dibon, Jazer, Nimrah, Heshbon, Elealeh, Sebam, Nebo and Beon, the land which the LORD conquered before the congregation of Israel, is a land for livestock, and your servants have livestock.” They said, “If we have found favor in your sight, let this land be given to your servants as a possession; do not take us across the Jordan.”