2 Samuel 17:23

Ahithophel … hanged himself. There is an old fancy, put down by Thenius as one of the curiosities of interpretation, that Ahithophel died of a quinsy; for the word might mean "was strangled or choked." But the act seems mentioned as a proof of Ahithophel's unerring judgment. Indignation at Absalom's folly, and at the slight cast upon himself, is not a sufficient reason for so violent a deed. He must have foreseen the certain ruin of the conspiracy if David was allowed time; and he knew that upon its failure would follow his own punishment. It is proof also that he was a fierce and ill-tempered man, and animated for some reason or other with a malignant hatred of David. The parallel between Ahithophel and the traitor Judas must strike every one.