Genesis 12:2-4

and I will make of thee a great nation, and I will bless thee, and make thy name great; and be thou a blessing: and I will bless them that bless thee, and him that curseth thee will I curse: and in thee shall all the families of the earth be blessed. So Abram went, as Jehovah had spoken unto him; and Lot went with him: and Abram was seventy and five years old when he departed out of Haran.