1 Timothy 1:18-20
18 This charge I entrust to you, Timothy, my child, in accordance with the prophecies previously made about you, that by them you may wage the good warfare, 19 holding faith and a good conscience. By rejecting this, some have made shipwreck of their faith, 20 among whom are Hymenaeus and Alexander, whom I have handed over to Satan that they may learn not to blaspheme. (ESV)