2 Samuel 13:20-22

Then Absalom her brother said to her, “Has Amnon your brother been with you? But now keep silent, my sister, he is your brother; do not take this matter to heart.” So Tamar remained and was desolate in her brother Absalom’s house. Now when King David heard of all these matters, he was very angry. But Absalom did not speak to Amnon either good or bad; for Absalom hated Amnon because he had violated his sister Tamar.