2 Samuel 1:16

And David said unto him, Thy blood be upon thy head, this bloody punishment was in agreement with the crime which he had confessed to; for thy mouth hath testified against thee, saying, I have slain the Lord's anointed. David thus avenged a notorious and shocking political crime. If a person accuses himself of some transgression and glories in a crime which he did not commit, he shows a disposition which is guilty before God, and need not be astonished if he is judged according to his own words.