St John 8:54-59

Jesus answered: If I glorify myself, my glory is nothing. It is my Father that glorifieth me, of whom you say that he is your God. And you have not known him, but I know him. And if I shall say that I know him not, I shall be like to you, a liar. But I do know him, and do keep his word. Abraham your father rejoiced that he might see my day: he saw it, and was glad. The Jews therefore said to him: Thou art not yet fifty years old, and hast thou seen Abraham? Jesus said to them: Amen, amen I say to you, before Abraham was made, I am. They took up stones therefore to cast at him. But Jesus hid himself, and went out of the temple.