Our Lord only checks the curiosity of Peter, and minds him to attend things which himself was concerned in; telling him, he was not concerned what became of John, whether he should die, or abide upon the earth until Christ's second coming: it was Peter's concern, without regarding what others did, or what became of them, himself to execute his Master's command, and follow his example.
Related Commentaries of John 21:22
John 21:22
22 Jesus saith unto him, If I will that he tarry till I come, what is that to thee? follow thou me.