Genesis 12:1-4 (NIV)
The Lord had said to Abram, “Go from your country, your people and your father’s household to the land I will show you. “I will make you into a great nation, and I will bless you; I will make your name great, and you will be a blessing. I will bless those who bless you, and whoever curses you I will curse; and all peoples on earth will be blessed through you.” So Abram went, as the Lord had told him; and Lot went with him. Abram was seventy-five years old when he set out from Harran.
Genesis 13:14-17 (NIV)
The Lord said to Abram after Lot had parted from him, “Look around from where you are, to the north and south, to the east and west. All the land that you see I will give to you and your offspring forever. I will make your offspring like the dust of the earth, so that if anyone could count the dust, then your offspring could be counted. Go, walk through the length and breadth of the land, for I am giving it to you.”
Genesis 15: 5-6 (NIV)
He took him outside and said, “Look up at the sky and count the stars—if indeed you can count them.” Then he said to him, “So shall your offspring be.” Abram believed the Lord, and he credited it to him as righteousness.
Genesis 17:4-8 (NIV)
“As for me, this is my covenant with you: You will be the father of many nations. No longer will you be called Abram; your name will be Abraham, for I have made you a father of many nations. I will make you very fruitful; I will make nations of you, and kings will come from you. I will establish my covenant as an everlasting covenant between me and you and your descendants after you for the generations to come, to be your God and the God of your descendants after you. The whole land of Canaan, where you now reside as a foreigner, I will give as an everlasting possession to you and your descendants after you; and I will be their God.”