Job 31:5

If I have walked with vanity - If I have been guilty of idolatry, or the worshipping of a false god: for thus שאו shau , which we here translate vanity, is used Jeremiah 18:15 ; (compare with Psalm 31:6 ; Hosea 12:11 ; and Jonah 2:9 ;), and it seems evident that the whole of Job's discourse here is a vindication of himself from all idolatrous dispositions and practices.