2 Samuel 13:2

Fell sick. This narrative is included in the Sacred Scriptures for the purpose of demonstrating what tragic consequences may come to the household of a man of God who has strayed from the pathway of right and yielded to the tempter. The defects of David’s children were in part attributable to his defects.

Thought it hard. He thought it difficult, under the circumstances, to do to her according to his desires. Having been accustomed to self-gratification and to carrying out his every desire, Amnon actually fretted himself sick because of his inability to gratify his wishes in regard to Tamar.

3. A friend. The friendship was evil and led to Amnon’s ruin. Had Amnon chosen his companions more wisely he might, in the crisis, have had the help of a real friend to give sound and saving counsel.

Very subtil. Jonadab was a crafty man who, by fair means or foul, would secure his ends.