Gen 15:1-3

God's Covenant with Abram 1After these things the word of the Lord came to Abram in a vision, “Do not be afraid, Abram, I am your shield; your reward shall be very great.”2But Abram said, “O Lord GOD, what will you give me, for I continue childless, and the heir of my house is Eliezer of Damascus?”3And Abram said, “You have given me no offspring, and so a slave born in my house is to be my heir.”