Numbers 32:2-7

the children of Gad and the children of Reuben came and spoke to Moses, to Eleazar the priest, and to the leaders of the congregation, saying, “Ataroth, Dibon, Jazer, Nimrah, Heshbon, Elealeh, Shebam, Nebo, and Beon, the country which the LORD defeated before the congregation of Israel, is a land for livestock, and your servants have livestock.” Therefore 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 over the Jordan.” And Moses said to the children of Gad and to the children of Reuben: “Shall your brethren go to war while you sit here? Now why will you discourage the heart of the children of Israel from going over into the land which the LORD has given them?