2 Amnon became so obsessed with his sister Tamar that he made himself ill. She was a virgin, and it seemed impossible for him to do anything to her.

Read 2 Samuel 13:2 Using Other Translations

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.
And Amnon was so tormented that he made himself ill because of his sister Tamar, for she was a virgin, and it seemed impossible to Amnon to do anything to her.
Amnon became so obsessed with Tamar that he became ill. She was a virgin, and Amnon thought he could never have her.