1 Timothy 4:1

The Spirit clearly says that in later times some will abandon the faith and follow deceiving spirits and things taught by demons.

The Spirit
John 16:13 "But when he, the Spirit of truth, comes, he will guide you into all truth. He will not speak on his own; he will speak only what he hears, and he will tell you what is yet to come."
Acts 8:29 The Spirit told Philip, "Go to that chariot and stay near it."
1 Corinthians 2:10 ... but God has revealed it to us by his Spirit. The Spirit searches all things, even the deep things of God.

clearly says that in later times
2 Timothy 3:1 But mark this: There will be terrible times in the last days.
2 Peter 3:3 First of all, you must understand that in the last days scoffers will come, scoffing and following their own evil desires.

some will abandon the faith and follow deceiving spirits
Matthew 24:10-11 "At that time many will turn away from the faith and will betray and hate each other, and many false prophets will appear and deceive many people."
Mark 13:5-6 Jesus said to them, "Watch out that no one deceives you. Many will come in my name, claiming, 'I am he,' and will deceive many."
Mark 13:22 "For false Christs and false prophets will appear and perform signs and miracles to deceive the elect--if that were possible."
Acts 20:29-30 "I know that after I leave, savage wolves will come in among you and will not spare the flock. Even from your own number men will arise and distort the truth in order to draw away disciples after them."
2 Thessalonians 2:3 Don't let anyone deceive you in any way, for that day will not come until the rebellion occurs and the man of lawlessness is revealed, the man doomed to destruction.

NOTES:
For further reading:
Acts 8:26-40
2 Timothy 3:1-9
2 Peter 3
Read Romans 8

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.