Then God said, “No, but your wife Sarah will bear you a son, and you will call his name Isaac. I will establish My covenant with him as an everlasting covenant and with his descendants after him.
One of them said, “I will certainly return to you about this time next year, and Sarah your wife will have a son.” And Sarah heard it in the tent door, which was behind him.
Moreover He said, “I am the God of your father, the God of Abraham, the God of Isaac, and the God of Jacob.” And Moses hid his face, for he was afraid to look upon God.