Genesis 15:3-5

King James Version

³ And Abram said, Behold, to me thou hast given no seed: and, lo, one born in my house is mine heir.

⁴ And, behold, the word of the Lord came unto him, saying, This shall not be thine heir; but he that shall come forth out of thine own bowels shall be thine heir.

⁵ And he brought him forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed be.