Philemon 1:10-14

I appeal to you for my [own spiritual] child Onesimus, whom I have fathered [in the faith] while a captive in these chains. Once he was useless to you, but now he is indeed useful to you as well as to me. I have sent him back to you in person, that is, like sending my very heart. I would have chosen to keep him with me, so that he might minister to me on your behalf during my imprisonment for the gospel; but I did not want to do anything without first getting your consent, so that your goodness would not be, in effect, by compulsion but of your own free will.