Gen. xviii. 1-8: And the Lord appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day; And he lifted up his eyes and looked, and, lo, three men stood by him: and when he saw them, he ran to meet them from the tent door, and bowed himself toward the ground, And said, My Lord, if now I have found favour in thy sight, pass not away, I pray thee, from thy servant: ... And Abraham ran unto the herd, and fetched a calf tender and good, and gave it unto a young man; and he hasted to dress it. And he took butter, and milk, and the calf which he had dressed, and set it before them; and he stood by them under the tree, and they did eat. Gen. xvi. 10-13: And the angel of the Lord said unto her, I will multiply thy seed exceedingly, that it shall not be numbered for multitude. And the angel of the Lord said unto her, Behold, thou art with child, and shalt bear a son, and shalt call his name Ishmael; because the Lord hath heard thy affliction.... And she called the name of the Lord that spake unto her, Thou God seest me: for she said, Have I also here looked after him that seeth me? Gen. xxii. 11, 12: And the angel of the Lord called unto him out of heaven, and said, Abraham, Abraham: and he said, Here am I. And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son, from me. Ex. iii. 2-6: And the Angel of the Lord appeared unto him in a flame of fire out of the midst of a bush: and he looked, and, behold, the bush burned with fire, and the bush was not consumed. And Moses said, I will not turn aside, and see this great sight, why the bush is not burnt. And when the Lord saw that he turned aside to see, God called unto him out of the midst of the bush, and said, Moses, Moses. And he said, Here am I. And he said, Draw not nigh hither: put off thy shoes from off thy feet; for the place whereon thou standest is holy ground. Moreover he said, I am the God of thy 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.