1 Timthoy 4:1 The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons.
1 Timothy 4:1 - 16
ESV - 1 Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and teachings of demons. 2 Through the insincerity of liars whose consciences are seared.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.