John 5:36
But the testimony which I have is of greater weight than John's; for the work that the Father has given me to carry out-- the work that I am doing--is in itself proof that the Father has sent me as his Messenger.
John 6:38
For I have come down from Heaven, to do, not my own will, but the will of him who sent me;
John 5:30
I can do nothing of myself; I judge as I am taught; and the judgment that I give is just, because my aim is not to do my own will, but the will of him who sent me.
John 11:42
I know that thou always headrest me; but I say this for the sake of the people standing near, so that they may believe that thou has sent me as thy Messenger."
John 14:11
Believe me," he said to them all, "when I say that I am in union with the Father and the Father with me, or else believe me on account of the work itself.