2 Samuel 13:2 in the World English Bible
Amnon was so troubled that he became sick because of his sister Tamar, for she was a virgin, and it seemed hard to Amnon to do anything to her.
Context
1 And it came to pass after this, that Absalom the son of David had a fair sister, whose name was Tamar; and Amnon the son of David loved her.
2 And Amnon was so vexed, that he fell sick for his sister Tamar; for she was a virgin; and Amnon thought it hard for him to do any thing to her.
3 But Amnon had a friend, whose name was Jonadab, the son of Shimeah David’s brother: and Jonadab was a very subtil man.