Genesis 15:1-3

After these things the word of the LORD came to Abram in a vision, saying, “Do not be afraid, Abram, I am your shield; Your reward [for obedience] shall be very great.” Abram said, “Lord GOD, what reward will You give me, since I am [leaving this world] childless, and he who will be the owner and heir of my house is this [servant] Eliezer from Damascus?” And Abram continued, “Since You have given no child to me, one (a servant) born in my house is my heir.”