James 2:20

Do you wish to know, O vain man, that faith apart from works is inefficient?

James 2:26

For as the body apart from the spirit is dead, so faith also apart from works is dead.

Romans 1:21

because, knowing God, they did not glorify Him as God, neither were they thankful; but they became vain in their reasonings, and their foolish heart was darkened.

1 Corinthians 15:35-36

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

Galatians 5:6

For in Christ Jesus neither circumcision or uncircumcision avails anything; but faith working through divine love.

Galatians 6:3

For if any one seems to be something, being nothing, he deceives himself.

Colossians 2:8

See that no one shall be deceiving you through philosophy and empty delusion, according to the tradition of men, according to the elements of the world, and not according to Christ,

1 Timothy 1:6

from which certain ones having deflected have gone out into empty talking,

Titus 1:10

For many are incorrigible, speaking vain things and egotistical, especially those from the circumcision,

James 1:26

But if any one seems to be religious, bridling not his own tongue, but deceiving his own heart, the religion of that man is vain.

James 2:17

So indeed faith, if it may not have works, is dead, as to 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
But if any one seems to be religious, bridling not his own tongue, but deceiving his own heart, the religion of that man is vain.
Romans 1:21
because, knowing God, they did not glorify Him as God, neither were they thankful; but they became vain in their reasonings, and their foolish heart was darkened.
1 Corinthians 15:35
But one will say, How are the dead raised? and with what body do they come?
Galatians 6:3
For if any one seems to be something, being nothing, he deceives himself.
Colossians 2:8
See that no one shall be deceiving you through philosophy and empty delusion, according to the tradition of men, according to the elements of the world, and not according to Christ,
1 Timothy 1:6
from which certain ones having deflected have gone out into empty talking,
Titus 1:10
For many are incorrigible, speaking vain things and egotistical, especially those from the circumcision,

That

James 2:14
But what is it profitable, my brethren, if one may say he has faith, but has not works? whether is faith able to save him?

General references

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