Job 9:20 in the King James Version
If I justify myself, mine own mouth shall condemn me: if I say, I am perfect, it shall also prove me perverse.
Context
19 If it is a matter of strength, behold, he is mighty! If of justice, ‘Who,’ says he, ‘will summon me?’
20 Though I am righteous, my own mouth will condemn me. Though I am blameless, it will prove me perverse.
21 I am blameless. I don’t respect myself. I despise my life.