2 Peter 3:17
Ye, therefore, beloved, knowing these things beforehand, be on your guard, lest, being carried away with error of the wicked, ye fall from your own steadfastness.
Matthew 7:15
"Beware of false prophets, who, indeed, come to you in sheep's clothing, but within are ravening wolves.
Matthew 16:6
And Jesus said to them, "Take heed, and beware of the leaven of the Pharisees and Sadducees."
Matthew 16:11
How is it that ye do not perceive that I spake not to you concerning bread? but beware of the leaven of the Pharisees and Sadducees?
Matthew 24:24-25
for there will arise false Christs and false prophets; and they will give great signs and wonders, so as to lead astray, if possible, even the elect.
Mark 13:22-23
for there will arise false Christs and false prophets, and will show signs and wonders, in order to lead astray, if possible, the elect.
John 16:4
But these things I have spoken to you, that, when their hour shall come, ye may remember them, that I told you. And these things I said not to you from the beginning, because I was with you.
Acts 2:42
and they were constantly attending the teaching of the apostles and the fellowship, and the breaking of bread, and the prayers.
Romans 16:18
For those who are such are not serving our Lord Christ, but their own belly; and, through their kind words and flattering speeches, they beguile the hearts of the simple.
1 Corinthians 10:12
Wherefore, let him who thinks he is standing take heed, lest he fall.
1 Corinthians 15:58
Therefore, my beloved brethren, become steadfast, immovable, abounding in the work of the Lord, knowing that your labor is not in vain in the Lord.
2 Corinthians 11:3
but I fear lest, by any means, as the serpent beguiled Eve in his craftiness, your minds should be corrupted from the simplicity and purity which is toward Christ.
2 Corinthians 11:13-15
For such men are false apostles, deceitful workers, transforming themselves into apostles of Christ;
Ephesians 4:14
that we may no longer be babes, billow-tossed, and carried about with every wind of teaching, in the sleight of men, in the craftiness suited to the artifice of error;
Philippians 3:2
Beware of the dogs, beware of the evil-workers, beware of the mutilation.
Colossians 2:5
for even if I am absent in the flesh, yet am I with you in the Spirit, rejoicing, and beholding your order, and the steadfastness of your faith in Christ.
Colossians 2:8
Beware, lest there should be any one who makes a spoil of you through his philosophy and vain deceits, according to the tradition of men, according to the rudiments of the world, and not according to Christ;
2 Timothy 4:15
of whom do you also beware; for greatly did he withstand our words.
Hebrews 3:14
for we have become partakers of Christ, if we hold fast the beginning of our confidence firm to the end:
1 Peter 5:9
whom resist, steadfast in the faith, knowing that the same kinds of sufferings are being accomplished in your brethren who are in the world.
2 Peter 1:10-12
Wherefore, brethren, give the more diligence to make your calling and election sure; for, if ye do these things, ye shall in nowise ever stumble;
2 Peter 2:18-22
For, uttering great swelling words of vanity, they entice, in desires of the flesh, by their lasciviousness, those just escaping from those who live in error;
Revelation 2:5
Remember, therefore whence you have fallen, and repent, and do your first works; or else I am coming to you, and will remove your candlestick out of its place, if you do not repent.