2 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
13:4And he said unto him, Why art thou, being the king's son, lean from day to day? wilt thou not tell me? And Amnon said unto him, I love Tamar, my brother Absalom's sister.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.