2 Samuel 13:2-4

Young's Literal Translation

² And Amnon hath distress -- even to become sick, because of Tamar his sister, for she [is] a virgin, and it is hard in the eyes of Amnon to do anything to her.

³ And Amnon hath a friend, and his name [is] Jonadab, son of Shimeah, David's brother, and Jonadab [is] a very wise man,

⁴ and saith to him, `Wherefore [art] thou thus lean, O king's son, morning by morning? dost thou not declare to me?' And Amnon saith to him, `Tamar -- sister of Absalom my brother -- I am loving.'