John 21:18-22

I assure you and most solemnly say to you, when you were younger you dressed yourself and walked wherever you wished; but when you grow old, you will stretch out your hands and arms, and someone else will dress you, and carry you where you do not wish to go.” Now He said this to indicate the kind of death by which Peter would glorify God. And after saying this, He said to him, “Follow Me [walk the same path of life that I have walked]!” Peter turned and saw the disciple whom Jesus loved following them; the one who also had leaned back on His chest at the supper and had said, “Lord, who is it that is going to betray You?” So when Peter saw him, he asked Jesus, “Lord, and what about this man [what is in his future]?” Jesus said to him, “If I want him to stay alive until I come [again], what is that to you? You follow Me!”