Job 27:12
"Behold, all ye yourselves have seen it; why then are ye thus altogether vain?"
Cross References (ranked by relevance)
Job 21:3
Suffer me that I may speak; and after that I have spoken, mock on.
Job 16:3
Shall vain words have an end? or what emboldeneth thee that thou answerest?
Job 17:2
Are there not mockers with me? and doth not mine eye continue in their provocation?
Ecclesiastes 8:14
There is a vanity which is done upon the earth; that there be just men, unto whom it happeneth according to the work of the wicked; again, there be wicked men, to whom it happeneth according to the work of the righteous: I said that this also is vanity.