1 Timothy 1:18-20

18I put this charge before you, Timothy my child, in keeping with the prophecies once spoken about you, in order that with such encouragement you may fight the good fight.

19To do this you must hold firmly to faith and a good conscience, which some have rejected and so have suffered shipwreck in regard to the faith.

20Among these are Hymenaeus and Alexander, whom I handed over to Satan to be taught not to blaspheme.