'Sick' in the Bible

Amnon was frustrated to the point of making himself sick over his sister Tamar because she was a virgin, but it seemed impossible to do anything to her.

Jonadab said to him, “Lie down on your bed and pretend you’re sick. When your father comes to see you, say to him, ‘Please let my sister Tamar come and give me something to eat. Let her prepare food in my presence so I can watch and eat from her hand.’”

So Amnon lay down and pretended to be sick. When the king came to see him, Amnon said to him, “Please let my sister Tamar come and make a couple of cakes in my presence so I can eat from her hand.”