Matthew 24:4

And Jesus answering said unto them, Beware that no man deceive you.

Ephesians 5:6

Let no man deceive you with vain words: for because of these things, the wrath of God cometh on the children of disobedience.

Colossians 2:8

Beware that no man make a prey of you by means of philosophy and vain delusion, after the tradition of men, after the principles of the world, and not after Christ:

2 Thessalonians 2:3

Let no man deceive you in any way: because that cannot be till the apostasy come first, and the man of sin appear, the son of perdition,

Mark 13:5-6

Then Jesus answering them, began to say, Beware that no man deceive you:

Mark 13:22

For many false Messiahs and false prophets shall arise, and shall propose signs and wonders to deceive, if it were possible, even the elect.

Luke 21:8

Then he said, Take heed that ye be not deluded: for many will come in my name, saying, I am he; and the period approaches: go not therefore after them.

2 Corinthians 11:13-15

For such are fake apostles, deceitful labourers, transforming themselves into apostles of Christ.

Ephesians 4:14

that we should be no longer infants, floating on the waves, and carried about with every wind of novel doctrine, by the juggling of men, by their craftiness after the delusive wiles of error;

Colossians 2:18

Let no man juggle you out of your prize, voluntary in [his] humility and the worship of angels, intruding into things which he never saw, vainly puffed up by his carnal imagination;

BUT there were false prophets among the people, as there will be false teachers also among you, who wickedly introduce damnable heresies, and deny the sovereign Lord who bought them, bringing on themselves swift destruction.

1 John 4:1

BELOVED, believe not every pretender to inspiration, but bring these spirits to the trial whether they are of God; because many false prophets are gone forth into the world.

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