Bible verses about Denial of Christ
(From Torrey's Topical Textbook)

In doctrine Mark 8:38; II Timothy 1:8 In practice Philippians 3:18,10; Titus 1:16 A characteristic of false teachers II Peter 2:1; Jude 1:4 Is the spirit of Antichrist I John 2:22,23; 4:3 Christ will deny those guilty of Matthew 10:33; II Timothy 2:12 Leads to destruction II Peter 2:1; Jude 1:4,15 Exemplified Peter Matthew 26:69-75 The Jews John 18:40; Acts 3:13,14