John 21:20-22

20 Then Peter, turning around, saw a disciple following. This was the disciple whom Jesus sincerely loved, the one who had also leaned on Jesus' breast at the supper and asked, "Lord, who is going to betray You?"  21 Peter seeing him, said to Jesus, "Lord, what about this man?"

22 Jesus said to him, “If I desire that he stay until I come, what is that to you? You follow me.”