2 Peter 3:16

As, indeed, in all his epistles, speaking in them concerning these things: in which there are some things hard to be understood, which the untaught and unstable wrest, as they do also the other scriptures, to their own destruction.

2 Peter 2:14

having eyes full of the adulteress, incessantly sinning, alluring unstable souls; having a heart exercised with insatiable desires; an accursed progeny:

1 Peter 2:8

a stone of stumbling, and a rock of offense. Those who stumble at the word, are disobedient unbelievers, to which, therefore, they were appointed:

2 Peter 2:1

But there were also false prophets among the people, even as there will be false teachers among you; who will privately introduce destructive sects, denying even the Lord who bought them, bringing on themselves swift destruction.

Jude 1:4

For certain men have come in privily, who long ago were before written to this very condemnation; ungodly men, perverting the favor of our God to lasciviousness, and denying the only sovereign Lord, even our Lord Jesus Christ.

Treasury of Scripture Knowledge

Summary

As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.

Unstable

Bible References

Unstable

2 Peter 2:14
having eyes full of the adulteress, incessantly sinning, alluring unstable souls; having a heart exercised with insatiable desires; an accursed progeny:

Unto their own

2 Peter 2:1
But there were also false prophets among the people, even as there will be false teachers among you; who will privately introduce destructive sects, denying even the Lord who bought them, bringing on themselves swift destruction.
1 Peter 2:8
a stone of stumbling, and a rock of offense. Those who stumble at the word, are disobedient unbelievers, to which, therefore, they were appointed:
Jude 1:4
For certain men have come in privily, who long ago were before written to this very condemnation; ungodly men, perverting the favor of our God to lasciviousness, and denying the only sovereign Lord, even our Lord Jesus Christ.