James 2:20

But wilt thou know, O vain man, that faith without works is dead?

James 2:26

For as the body without a spirit is dead, so also faith without works is dead.

Job 11:11-12

For he knoweth vain men, and seeth wickedness when man doth not consider it;

Psalm 94:8-11

Understand, ye brutish among the people; and ye fools, when will ye be wise?

Proverbs 12:11

He that tilleth his land shall be satisfied with bread; but he that followeth the worthless is void of understanding.

Jeremiah 2:5

Thus saith Jehovah: What injustice have your fathers found in me, that they are gone far from me, and have walked after vanity, and become vain?

Romans 1:21

Because, knowing God, they glorified him not as God, neither were thankful; but fell into folly in their thoughts, and their heart without understanding was darkened:

1 Corinthians 15:35-36

But some one will say, How are the dead raised? and with what body do they come?

Galatians 5:6

For in Christ Jesus neither circumcision has any force, nor uncircumcision; but faith working through love.

Galatians 6:3

For if any man reputes himself to be something, being nothing, he deceives himself;

Colossians 2:8

See that there be no one who shall lead you away as a prey through philosophy and vain deceit, according to the teaching of men, according to the elements of the world, and not according to Christ.

1 Timothy 1:6

which things some having missed, have turned aside to vain discourse,

Titus 1:10

For there are many and disorderly vain speakers and deceivers of people's minds, specially those of the circumcision,

James 1:26

If any one think himself to be religious, not bridling his tongue, but deceiving his heart, this man's religion is vain.

James 2:17

So also faith, if it have not works, is dead by itself.

Treasury of Scripture Knowledge

Summary

But wilt thou know, O vain man, that faith without works is dead?

That

General references

Bible References

O vain

James 1:26
If any one think himself to be religious, not bridling his tongue, but deceiving his heart, this man's religion is vain.
Job 11:11
For he knoweth vain men, and seeth wickedness when man doth not consider it;
Psalm 94:8
Understand, ye brutish among the people; and ye fools, when will ye be wise?
Proverbs 12:11
He that tilleth his land shall be satisfied with bread; but he that followeth the worthless is void of understanding.
Jeremiah 2:5
Thus saith Jehovah: What injustice have your fathers found in me, that they are gone far from me, and have walked after vanity, and become vain?
Romans 1:21
Because, knowing God, they glorified him not as God, neither were thankful; but fell into folly in their thoughts, and their heart without understanding was darkened:
1 Corinthians 15:35
But some one will say, How are the dead raised? and with what body do they come?
Galatians 6:3
For if any man reputes himself to be something, being nothing, he deceives himself;
Colossians 2:8
See that there be no one who shall lead you away as a prey through philosophy and vain deceit, according to the teaching of men, according to the elements of the world, and not according to Christ.
1 Timothy 1:6
which things some having missed, have turned aside to vain discourse,
Titus 1:10
For there are many and disorderly vain speakers and deceivers of people's minds, specially those of the circumcision,

That

James 2:14
What is the profit, my brethren, if any one say he have faith, but have not works? can faith save him?

General references

1 Corinthians 15:14
but if Christ is not raised, then, indeed, vain also is our preaching, and vain also your faith.