Philemon 1:10-13

10I appeal to you for my [own spiritual] child Onesimus, whom I have fathered [in the faith] while a captive in these chains.

11Once he was useless to you, but now he is indeed useful to you as well as to me.

12I have sent him back to you in person, that is, like sending my very heart.

13I would have chosen to keep him with me, so that he might minister to me on your behalf during my imprisonment for the gospel;