Acts 13:7
and he was with the proconsul, Sergius Paulus, who was a man of intelligence. This man called for Barnabas and Saul, and expressed an earnest wish to hear the word of God.
Romans 16:18-19
For such serve not our Lord Christ, but their own appetites; and, by good words and fair speeches, they deceive the hearts of the simple.
Ephesians 4:14
that we might no longer be children, tossed and carried about by every wind of teaching, through the artifice of men, through craftiness used by them for the deliberate planning of deceit;
Ephesians 5:17
Wherefore, be not ignorant, but understand what the will of the Lord is.
1 John 4:1
Beloved, believe not every spirit; but prove the spirits, whether they are from God: for many false prophets have gone out into the world.