Hereupon God opened the heavens, and Abraham heard the words, "By Myself I swear!"
Abraham: "Thou swearest, and also I swear, I will not leave this altar until I have said what I have to say."
God: "Speak whatsoever thou hast to speak!"
Abraham: "Didst Thou not promise me Thou wouldst let one come forth out of mine own bowels, whose seed should fill the whole world?"
God: "Yes."
Abraham: "Whom didst Thou mean?"
God: "Isaac."
Abraham: "Didst Thou not promise me to make my seed as numerous as the sand of the sea-shore?"
God: "Yes."
Abraham: "Through which one of my children?"