2 Samuel 13:6

But Amnon had a friend whose name was Jonadab the son of Shimeah, David’s brother; and Jonadab was a very subtle man.

He said to him, “Why, son of the king, are you so sad from day to day? Won’t you tell me?”

Amnon said to him, “I love Tamar, my brother Absalom’s sister.”

Jonadab said to him, “Lay down on your bed and pretend to be sick. When your father comes to see you, tell him, ‘Please let my sister Tamar come and give me bread to eat, and prepare the food in my sight, that I may see it and eat it from her hand.’”

Then David sent home to Tamar, saying, “Go now to your brother Amnon’s house, and prepare food for him.”

So Tamar went to her brother Amnon’s house; and he was lying down. She took dough, kneaded it, made cakes in his sight, and baked the cakes.

She took the pan and poured them out before him, but he refused to eat. Amnon said, “Have all men leave me.” Then every man went out from him.