Genesis 15:1-3

After these things the word of the LORD came to Abram in a vision, saying, “Do not fear, Abram, I am a shield to you; Your reward shall be very great.” Abram said, “O Lord GOD, what will You give me, since I am childless, and the heir of my house is Eliezer of Damascus?” And Abram said, “Since You have given no offspring to me, one born in my house is my heir.”