2 Samuel 13:2-4

New Century Version

² Tamar was a virgin. Amnon made himself sick just thinking about her, because he could not find any chance to be alone with her.

³ Amnon had a friend named Jonadab son of Shimeah, David’s brother. Jonadab was a very clever man. ⁴ He asked Amnon, “Son of the king, why do you look so sad day after day? Tell me what’s wrong!”

Amnon told him, “I love Tamar, the sister of my half-brother Absalom.”