Genesis 15:2-5

2But Abram said, ‘Almighty Lord, there is one gift that I want. I still have no children. When I die, Eliezer of Damascus will receive everything that I have.

3Because you have not given me any children, understand this: Everything that I have will one day belong to a servant in my house.’

4The Lord gave Abram this message: ‘No! Eliezer will not be the one who receives your things. You will have your own son. He will be the one who receives everything that you have.’

5The Lord took Abram outside. He said to Abram, ‘Look up at the sky. Count the stars. They are too many for you to count!’ Then God said, ‘That is how many descendants you will have.’