The Call of Abram
1 Now the Lord said to Abram, “Go from your country and your kindred and your father's house to the land that I will show you. 2 And I will make of you a great nation, and I will bless you and make your name great, so that you will be a blessing. 3 I will bless those who bless you, and him who dishonors you I will curse, and in you all the families of the earth shall be blessed.” 4 So Abram went, as the Lord had told him, and Lot went with him. Abram was seventy-five years old when he departed from Haran.
Genesis 12:1-4 (ESV)