Genesis 14:21-15:6

Then the king of Sodom said to Abram, "Give me the persons, and take the possessions for yourself." But Abram said to the king of Sodom, "I swear to the Lord, God Most High, Creator of heaven and earth: I will not take so much as a thread or a sandal strap of what is yours; you shall not say, 'It is I who made Abram rich.' For me, nothing but what my servants have used up; as for the share of the men who went with me--Aner, Eshkol, and Mamre--let them take their share." Some time later, the word of the Lord came to Abram in a vision. He said, "Fear not, Abram, I am a shield to you; Your reward shall be very great." But Abram said, "O Lord God, what can You give me, seeing that I shall die childless, and the one in charge of my household is Dammesek Eliezer!" Abram said further, "Since You have granted me no offspring, my steward will be my heir." The word of the Lord came to him in reply, "That one shall not be your heir; none but your very own issue shall be your heir." He took him outside and said, "Look toward heaven and count the stars, if you are able to count them." And He added, "So shall your offspring be." And because he put his trust in the Lord, He reckoned it to his merit.