James 2:20

But, O vain man, dost thou desire to know that faith without works is dead?

James 2:26

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

Job 11:11-12

For he knows the vain men; and he sees the iniquity; will he not then understand it?

Psalm 94:8-11

Understand, ye carnal ones among the people, and, ye fools, when will ye be wise?

Proverbs 12:11

He that tills his land shall be satisfied with bread, but he that follows vain persons is void of understanding.

Jeremiah 2:5

thus hath the LORD said, What iniquity have your fathers found in me that they are gone far from me and have walked after vanity and are become vain?

Romans 1:21

because having known God, they did not glorify him as God, neither were thankful, but became vain in their imaginations, and their foolish heart was darkened.

1 Corinthians 15:35-36

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

Galatians 5:6

For in Christ Jesus neither circumcision avails anything nor uncircumcision, but faith which works by charity.

Galatians 6:3

For if anyone thinks himself to be something, when he is nothing, he deceives himself.

Colossians 2:8

Beware lest any man spoil you through philosophy and vain deceit, after the traditions of men, according to the elements of the world, and not after Christ.

1 Timothy 1:6

from which some, having swerved, have turned aside unto vanity of words,

Titus 1:10

For there are many insubordinate and vain talkers and deceivers of souls, especially those of the circumcision,

James 1:26

If anyone among you thinks to be religious and does not bridle his tongue, but deceives his own heart, his religion is vain.

James 2:17

Even so faith, if it does not have works, is dead in and of 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 anyone among you thinks to be religious and does not bridle his tongue, but deceives his own heart, his religion is vain.
Job 11:11
For he knows the vain men; and he sees the iniquity; will he not then understand it?
Psalm 94:8
Understand, ye carnal ones among the people, and, ye fools, when will ye be wise?
Proverbs 12:11
He that tills his land shall be satisfied with bread, but he that follows vain persons is void of understanding.
Jeremiah 2:5
thus hath the LORD said, What iniquity have your fathers found in me that they are gone far from me and have walked after vanity and are become vain?
Romans 1:21
because having known God, they did not glorify him as God, neither were thankful, but became vain in their imaginations, and their foolish heart was darkened.
1 Corinthians 15:35
But someone will say, How are the dead raised up? and with what body do they come?
Galatians 6:3
For if anyone thinks himself to be something, when he is nothing, he deceives himself.
Colossians 2:8
Beware lest any man spoil you through philosophy and vain deceit, after the traditions of men, according to the elements of the world, and not after Christ.
1 Timothy 1:6
from which some, having swerved, have turned aside unto vanity of words,
Titus 1:10
For there are many insubordinate and vain talkers and deceivers of souls, especially those of the circumcision,

That

James 2:14
My brethren, What shall it profit though someone says that they have faith and do not have works? Shall this type of faith be able to save them?

General references

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