2 Samuel 13:2

13:2 But Amnon became frustrated because he was so lovesick over his sister Tamar. For she was a virgin, and to Amnon it seemed out of the question to do anything to her.

2 Samuel 13:18

13:18 (Now she was wearing a long robe, for this is what the king’s virgin daughters used to wear.) So Amnon’s attendant removed her and bolted the door behind her.