1Now the children of Reuben and the children of Gad had a very great multitude of livestock. They saw the land of Jazer, and the land of Gilead. Behold, the place was a place for livestock. 2Then the children of Gad and the children of Reuben came and spoke to Moses, and to Eleazar the priest, and to the princes of the congregation, saying, 3“Ataroth, Dibon, Jazer, Nimrah, Heshbon, Elealeh, Sebam, Nebo, and Beon, 4the land which Yahweh struck before the congregation of Israel, is a land for livestock; and your servants have livestock.” 5They said, “If we have found favor in your sight, let this land be given to your servants for a possession. Don’t bring us over the Jordan.”
6Moses said to the children of Gad, and to the children of Reuben, “Shall your brothers go to war while you sit here? 7Why do you discourage the heart of the children of Israel from going over into the land which Yahweh has given them? 8Your fathers did so when I sent them from Kadesh Barnea to see the land. 9For when they went up to the valley of Eshcol, and saw the land, they discouraged the heart of the children of Israel, that they should not go into the land which Yahweh had given them. 10Yahweh’s anger burned in that day, and he swore, saying, 11‘Surely none of the men who came up out of Egypt, from twenty years old and upward, shall see the land which I swore to Abraham, to Isaac, and to Jacob; because they have not wholly followed me, 12except Caleb the son of Jephunneh the Kenizzite, and Joshua the son of Nun, because they have followed Yahweh completely.’ 13Yahweh’s anger burned against Israel, and he made them wander back and forth in the wilderness forty years, until all the generation who had done evil in Yahweh’s sight was consumed.
14“Behold, you have risen up in your fathers’ place, an increase of sinful men, to increase the fierce anger of Yahweh toward Israel. 15For if you turn away from after him, he will yet again leave them in the wilderness; and you will destroy all these people.”
16They came near to him, and said, “We will build sheepfolds here for our livestock, and cities for our little ones; 17but we ourselves will be ready armed to go before the children of Israel, until we have brought them to their place. Our little ones shall dwell in the fortified cities because of the inhabitants of the land. 18We will not return to our houses until the children of Israel have all received their inheritance. 19For we will not inherit with them on the other side of the Jordan and beyond, because our inheritance has come to us on this side of the Jordan eastward.”
20Moses said to them: “If you will do this thing, if you will arm yourselves to go before Yahweh to the war, 21and every one of your armed men will pass over the Jordan before Yahweh until he has driven out his enemies from before him, 22and the land is subdued before Yahweh; then afterward you shall return, and be clear of obligation to Yahweh and to Israel. Then this land shall be your possession before Yahweh.
23“But if you will not do so, behold, you have sinned against Yahweh; and be sure your sin will find you out. 24Build cities for your little ones, and folds for your sheep; and do that which has proceeded out of your mouth.”
25The children of Gad and the children of Reuben spoke to Moses, saying, “Your servants will do as my lord commands. 26Our little ones, our wives, our flocks, and all our livestock shall be there in the cities of Gilead; 27but your servants will pass over, every man who is armed for war, before Yahweh to battle, as my lord says.”
28So Moses commanded concerning them to Eleazar the priest, and to Joshua the son of Nun, and to the heads of the fathers’ households of the tribes of the children of Israel. 29Moses said to them, “If the children of Gad and the children of Reuben will pass with you over the Jordan, every man who is armed to battle before Yahweh, and the land is subdued before you, then you shall give them the land of Gilead for a possession; 30but if they will not pass over with you armed, they shall have possessions among you in the land of Canaan.”
31The children of Gad and the children of Reuben answered, saying, “As Yahweh has said to your servants, so will we do. 32We will pass over armed before Yahweh into the land of Canaan, and the possession of our inheritance shall remain with us beyond the Jordan.”
33Moses gave to them, even to the children of Gad, and to the children of Reuben, and to the half-tribe of Manasseh the son of Joseph, the kingdom of Sihon king of the Amorites, and the kingdom of Og king of Bashan; the land, according to its cities and borders, even the cities of the surrounding land. 34The children of Gad built Dibon, Ataroth, Aroer, 35Atroth-shophan, Jazer, Jogbehah, 36Beth Nimrah, and Beth Haran: fortified cities and folds for sheep. 37The children of Reuben built Heshbon, Elealeh, Kiriathaim, 38Nebo, and Baal Meon, (their names being changed), and Sibmah. They gave other names to the cities which they built. 39The children of Machir the son of Manasseh went to Gilead, took it, and dispossessed the Amorites who were therein. 40Moses gave Gilead to Machir the son of Manasseh; and he lived therein. 41Jair the son of Manasseh went and took its villages, and called them Havvoth Jair. 42Nobah went and took Kenath and its villages, and called it Nobah, after his own name.
Jacob was the son of Isaac and Rebekah, born immediately after Esau, and Abraham was his grandfather. He achieved the right of the firstborn by trickery, in offering his older brother, Esau, food in exchange for the birthright, who cared little for this position. He also received the blessing of firstborn from his father Jacob before his death by cunning, and with the assistance of his mother Rebekah.
After his deception of Esau, receiving the blessing from his father, Jacob escaped to his uncle Laban, who in turn deceived Jacob into working for fourteen years for the marriage of Jacob to Leah, and then his beloved Rachel. Laban also sought to deceive Jacob of wages, but God intervened to ensure he would prosper. In a time of trial, when he feared the wrath of Esau, upon returning to the land of Canaan, Jacob had an encounter with God, and his name was changed to Israel, the one who wrestles with God. Even though his early life was characterized by deception, God worked through the situation to ensure that Jacob would be the one in the line of the patriarchs, to create a great nation and ultimately fulfill His purposes in the earth, especially through the future Messiah. The Messiah would guarantee the promise of the land to Abram and a person who would rule over Abraham's descendants, but also He would bring blessings to all the people of the earth (Gen 12:1-3).
In spite of Jacob's early failure by deception, God worked through him, and finally, Jacob became a different type of man after his struggle with God. As one has said,
"Despite Jacob’s faults, God chose him to be the leader of a great nation that still bears his name today. But for this, it is unlikely that we would know much about Jacob, who appears to be in the middle of events while the key players are those around him. There is no great wisdom or bravery in Jacob to speak of, and we are tempted to see him as little more than God’s passive instrument. If we are tempted to think that, because we aren’t in the spotlight performing great acts for God, we are unimportant to Him, then we should consider the life of Jacob and know that, in spite of our failings, God can and will still use us in His plan."
For more on Jacob, see "Who was Jacob in the Bible?", https://www.gotquestions.org/life-Jacob.html