Now Amnon had a friend named Jonadab, the son of David’s brother Shimeah. Jonadab was a very shrewd man,
We have here a particular account of the abominable wickedness of Amnon in ravishing his sister, a subject not fit to be enlarged upon nor indeed to be mentioned without blushing, that ever any man should be so vile, especially that a son of David should be so.
Commenting on 2 Samuel 13:1-20
But Amnon had a friend,.... Though in the issue his friendship proved his ruin: whose name was Jonadab, the son of Shimeah, David's brother; so that they were own cousins, the same with Shammah, Sa1 16:9, and Jonadab was a very subtle man; a very penetrating man into the dispositions of men, and could judge by their countenances what they were, and the affections of...
Jonadab, the son of Shimeah--or Shammah (Sa1 16:9). By the counsel and contrivance of this scheming cousin a plan was devised for obtaining an unrestricted interview with the object of his attachment.