Matthew 7:15
"Beware of false prophets, who come to you in sheep's clothing, but inwardly they are ravenous wolves.
Romans 16:18
For such persons do not serve our Lord Christ, but their own appetites, and by smooth and flattering words they deceive the hearts of the simple.
2 Corinthians 11:13-15
For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ.
Galatians 2:4
But it was because of the false brethren secretly brought in, who had slipped in to spy out our freedom which we have in Christ Jesus, in order to bring us into bondage.
Ephesians 4:14
As a result, we are no longer to be children, tossed here and there by waves and carried about by every wind of doctrine, by the cunning of men, by their craftiness in deceitful scheming.
2 Thessalonians 2:9-10
The coming of the lawless one by the activity of Satan will be with all power and with pretended signs and wonders,
1 Timothy 4:1-2
Now the Spirit expressly says that in later times some will fall away from the faith by giving heed to deceitful spirits and doctrines of demons,
Titus 1:10-12
For there are many rebellious men, empty talkers and deceivers, especially those of the circumcision.
Revelation 13:11-14
Then I saw another beast coming up out of the earth; and he had two horns like a lamb and he spoke like a dragon.
Revelation 19:20
And the beast was captured, and with him the false prophet who had performed the signs in his presence, by which he deceived those who had received the mark of the beast and those who worshipped his image. These two were thrown alive into the lake of fire which burns with sulfur.