2 Samuel 13:3-5

Amnon had a friend named Jonadab son of Shimeah, David’s brother. Jonadab was a very clever man. He asked Amnon, “Son of the king, why do you look so sad day after day? Tell me what’s wrong!” Amnon told him, “I love Tamar, the sister of my half-brother Absalom.” Jonadab said to Amnon, “Go to bed and act as if you are sick. Then your father will come to see you. Tell him, ‘Please let my sister Tamar come in and give me food to eat. Let her make the food in front of me so I can watch and eat it from her hand.’ ”