II Samuel 13:1-6

After this Absalom the son of David had a lovely sister, whose name was Tamar; and Amnon the son of David loved her. Amnon was so distressed over his sister Tamar that he became sick; for she was a virgin. And it was improper for Amnon to do anything to her. But Amnon had a friend whose name was Jonadab the son of Shimeah, David’s brother. Now Jonadab was a very crafty man. And he said to him, “Why are you, the king’s son, becoming thinner day after day? Will you not tell me?” Amnon said to him, “I love Tamar, my brother Absalom’s sister.” So Jonadab said to him, “Lie down on your bed and pretend to be ill. And when your father comes to see you, say to him, ‘Please let my sister Tamar come and give me food, and prepare the food in my sight, that I may see it and eat it from her hand.’ ” Then Amnon lay down and pretended to be ill; and when the king came to see him, Amnon said to the king, “Please let Tamar my sister come and make a couple of cakes for me in my sight, that I may eat from her hand.”