Thematic Bible: In asking jesus, "what will this man do?"

But Peter, having turned around, sees the disciple whom Jesus loves, following, who also leaned near his chest at the supper, and said, Lord, who is the man betraying thee? Having seen this man, Peter says to Jesus, Lord, and what of this man? Jesus says to him, If I want him to remain until I come, what is it to thee? Follow thou me.