John 15:6
If anyone does not remain in Me, he is like a branch that is thrown away and withers. Such branches are gathered up, thrown into the fire, and burned.

1 John 2:19
They went out from us, but they did not belong to us. For if they had belonged to us, they would have remained with us. But their departure made it clear that none of them belonged to us.

Matthew 13:20-21
The seed sown on rocky ground is the one who hears the word and at once receives it with joy. / But since he has no root, he remains for only a season. When trouble or persecution comes because of the word, he quickly falls away.

Hebrews 6:4-6
It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, / who have tasted the goodness of the word of God and the powers of the coming age— / and then have fallen away—to be restored to repentance, because they themselves are crucifying the Son of God all over again and subjecting Him to open shame.

Luke 8:13
The seeds on rocky ground are those who hear the word and receive it with joy, but they have no root. They believe for a season, but in the time of testing, they fall away.

2 Timothy 4:10
because Demas, in his love of this world, has deserted me and gone to Thessalonica. Crescens has gone to Galatia, and Titus to Dalmatia.

Matthew 24:10
At that time many will fall away and will betray and hate one another,

Mark 4:16-17
Some are like the seeds sown on rocky ground. They hear the word and at once receive it with joy. / But they themselves have no root, and they remain for only a season. When trouble or persecution comes because of the word, they quickly fall away.

2 Peter 2:20-22
If indeed they have escaped the corruption of the world through the knowledge of our Lord and Savior Jesus Christ, only to be entangled and overcome by it again, their final condition is worse than it was at first. / It would have been better for them not to have known the way of righteousness than to have known it and then to turn away from the holy commandment passed on to them. / Of them the proverbs are true: “A dog returns to its vomit,” and, “A sow that is washed goes back to her wallowing in the mud.”

Galatians 5:4
You who are trying to be justified by the law have been severed from Christ; you have fallen away from grace.

Hebrews 10:38-39
But My righteous one will live by faith; and if he shrinks back, I will take no pleasure in him.” / But we are not of those who shrink back and are destroyed, but of those who have faith and preserve their souls.

Matthew 7:21-23
Not everyone who says to Me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only he who does the will of My Father in heaven. / Many will say to Me on that day, ‘Lord, Lord, did we not prophesy in Your name, and in Your name drive out demons and perform many miracles?’ / Then I will tell them plainly, ‘I never knew you; depart from Me, you workers of lawlessness!’

1 Timothy 4:1
Now the Spirit expressly states that in later times some will abandon the faith to follow deceitful spirits and the teachings of demons,

Jeremiah 17:5
This is what the LORD says: “Cursed is the man who trusts in mankind, who makes mere flesh his strength and turns his heart from the LORD.

Isaiah 29:13
Therefore the Lord said: “These people draw near to Me with their mouths and honor Me with their lips, but their hearts are far from Me. Their worship of Me is but rules taught by men.