1 Timothy 4:1 English Standard Version (ESV)
Some Will Depart from the Faith
4 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 Peter 2:1 English Standard Version (ESV)
False Prophets and Teachers
2 But false prophets also arose among the people, just as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them, bringing upon themselves swift destruction.