Genesis 15:3-5

Revised Standard Version

³ And Abram said, “Behold, thou hast given me no offspring; and a slave born in my house will be my heir.” ⁴ And behold, the word of the Lord came to him, “This man shall not be your heir; your own son shall be your heir.” ⁵ And he brought him outside and said, “Look toward heaven, and number the stars, if you are able to number them.” Then he said to him, “So shall your descendants be.”