The Promise of a Seed (Chapter XX.).
1 And the Eternal Mighty One said to me: “Abraham, Abraham!” And I said: “Here am I.” [And He said:] “Consider from above the stars which are beneath thee, and number, them [for me], and make known [to me] their number.” And I said: “When can I? For I am but a man [of dust and ashes].” And he said to me: “As the number of the stars and their power, (so will) I make thy seed a nation and a people, set apart for me in my heritage with Azazel.”
2 And I said: “O Eternal, Mighty One! Let thy servant speak before Thee, and let not Thine anger kindle against Thy chosen one! Lo, before Thou leddest me up Azazel inveighed against me. How, then, while he is not now before Thee, hast Thou constituted Thyself with him?”