‘Forgive me my foul murder’?
That cannot be; since I am still possess’d
Of those effects for which I did the murder,
My crown, mine own ambition and my queen.
May one be pardon’d and retain the offence?

– William Shakespeare

Hamlet, Act 3, Scene 3. Claudius admits killing his brother, the previous king. But he is not prepared to repent enough to give up what he has gained through the murder. Any guilt he has is overcome by his greed. So his prayer is rather hypocritical.