From DIALOGUE WITH TRYPHO:

And again, when He says, ‘I shall behold the heavens, the works of Thy fingers,’ unless I understand His method of using words, I shall not understand intelligently, but just as your teachers suppose, fancying that the Father of all, the unbegotten God, has hands and feet, and fingers, and a soul, like a composite being; and they for this reason teach that it was the Father Himself who appeared to Abraham and to Jacob.