Passage cross-references.

Even so faith, if it hath not works, is dead, being alone.

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

He that tilleth his land shall be satisfied with bread: but he that followeth vain persons is void of understanding.

Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.

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

For he knoweth vain men: he seeth wickedness also; will he not then consider it? …

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

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

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

Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ.

From which some having swerved have turned aside unto vain jangling;

For there are many unruly and vain talkers and deceivers, specially they of the circumcision:

If any man among you seem to be religious, and bridleth not his tongue, but deceiveth his own heart, this man’s religion is vain.

For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.