Shmuel Bais 13:1-2

Orthodox Jewish Bible

13 And it came to pass after this, that Avshalom Ben Dovid had an achot yafeh (beautiful sister), whose shem was Tamar; and Amnon Ben Dovid loved her.

² And Amnon was so distressed, that he fell ill for his achot Tamar; for she was betulah; but Amnon thought it impossible for him to do anything to her.