2Pe 2 Peter, chapter Second Epistle of Peter, chapter 2
Because those teachers of false doctrine will entice people to behave wickedly, God has reserved darkest hell for them.
2 Peter 2:17-22
Because God will severely punish them, it would have been better for them if they had never known what it means to live in a righteous way. It is too bad that although they knew how to live in a righteous way, they stopped doing the things that God commanded people to do, the things that were taught to them ◄by us apostles/by Christ► {that ◄we apostles/Christ► taught to them}.