Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[162] WHEN the king was returned to Jerusalem, a sad misfortune befell his house, on the occasion following: He had a daughter, who was yet a virgin, and very handsome, insomuch that she surpassed all the most beautiful women; her name was Tamar; she had the same mother with Absalom. Now Amnon, David's eldest son, fell in love with her, and being not able to obtain his desires, on account of her virginity, and the custody she was under, was so much out of order, nay, his grief so eat up his body, that he grew lean, and his color was changed. Now there was one Jenadab, a kinsman and friend of his, who discovered this his passion, for he was an extraordinary wise man, and of great sagacity of mind. When, therefore, he saw that every morning Amnon was not in body as he ought to be, he came to him, and desired him to tell him what was the cause of it: however, he said that he guessed that it arose from the passion of love. Amnon confessed his passion, that he was in love with a sister of his, who had the same father with himself. So Jenadab suggested to him by what method and contrivance he might obtain his desires; for he persuaded him to pretend sickness, and bade him, when his father should come to him, to beg of him that his sister might come and minister to him; for if that were done, he should be better, and should quickly recover from his distemper. So Amnon lay down on his bed, and pretended to be sick, as Jonadab had suggested. When his father came, and inquired how he did, he begged of him to send his sister to him. Accordingly, he presently ordered her to be brought to him; and when she was come, Amnon bade her make cakes for him, and fry them in a pan, and do it all with her own hands, because he should take them better from her hand [than from any one's else]. So she kneaded the flour in the sight of her brother, and made him cakes, and baked them in a pan, and brought them to him; but at that time he would not taste them, but gave order to his servants to send all that were there out of his chamber, because he had a mind to repose himself, free from tumult and disturbance. As soon as what he had commanded was done, he desired his sister to bring his supper to him into the inner parlor; which, when the damsel had done, he took hold of her, and endeavored to persuade her to lie with him. Whereupon the damsel cried out, and said, "Nay, brother, do not force me, nor be so wicked as to transgress the laws, and bring upon thyself the utmost confusion. Curb this thy unrighteous and impure lust, from which our house will get nothing but reproach and disgrace." She also advised him to speak to his father about this affair; for he would permit him [to marry her]. This she said, as desirous to avoid her brother's violent passion at present. But he would not yield to her; but, inflamed with love and blinded with the vehemency of his passion, he forced his sister: but as soon as Amnon had satisfied his lust, he hated her immediately, and giving her reproachful words, bade her rise up and be gone. And when she said that this was a more injurious treatment than the former, if, now he had forced her, he would not let her stay with him till the evening, but bid her go away in the day-time, and while it was light, that she might meet with people that would be witnesses of her shame, - he commanded his servant to turn her out of his house. Whereupon she was sorely grieved at the injury and violence that had been offered to her, and rent her loose coat, (for the virgins of old time wore such loose coats tied at the hands, and let down to the ankles, that the inner coats might not be seen,) and sprinkled ashes on her head; and went up the middle of the city, crying out and lamenting for the violence that had been offered her. Now Absalom, her brother, happened to meet her, and asked her what sad thing had befallen her, that she was in that plight; and when she had told him what injury had been offered her, he comforted her, and desired her to be quiet, and take all patiently, and not to esteem her being corrupted by her brother as an injury. So she yielded to his advice, and left off her crying out, and discovering the force offered her to the multitude; and she continued as a widow with her brother Absalom a long time.