James 2:20

But art thou willing to know, O empty man, that faith without works is dead?

James 2:26

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

Romans 1:21

Because knowing God, they did not glorify him as God, neither were thankful, but became vain in their reasonings, and their foolish heart 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 availeth any thing, nor uncircumcision, but faith which worketh by love.

Galatians 6:3

For if any man think himself to be something, when he is nothing, he deceiveth himself.

Colossians 2:8

Beware lest any man make a prey of you through philosophy and empty deceit, after the traditions of men, after the rudiments of this world, and not after Christ.

1 Timothy 1:6

From which some, having missed the mark, are turned aside to vain jangling:

Titus 1:10

For there are many unruly vain-talkers and deceivers, especially they of the circumcision,

James 1:26

If any one be ever so religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.

James 2:17

So likewise faith, if it hath not works, is dead in 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 be ever so religious, and bridleth not his tongue, but deceiveth his own heart, this man's religion is vain.
Romans 1:21
Because knowing God, they did not glorify him as God, neither were thankful, but became vain in their reasonings, and their foolish heart 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 think himself to be something, when he is nothing, he deceiveth himself.
Colossians 2:8
Beware lest any man make a prey of you through philosophy and empty deceit, after the traditions of men, after the rudiments of this world, and not after Christ.
1 Timothy 1:6
From which some, having missed the mark, are turned aside to vain jangling:
Titus 1:10
For there are many unruly vain-talkers and deceivers, especially they of the circumcision,

That

James 2:14
What doth it profit, my brethren, tho' a man say he hath faith, and have not works?

General references

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