Titus Livius (Livy), The History of Rome, Book 31
Cyrus Evans, Ed.

17. At first the people of Abydus, by means of engines placed along the walls, not only prevented the approaches by land, but annoyed the enemy's ships in their station. [2] Afterwards a part of the wall being thrown down, and the assailants having penetrated by mines to an inner wall, which had been hastily raised to oppose their entrance, they sent ambassadors to the king about the conditions of the surrender of the city. [3] They demanded permission to send away the Rhodian quadrireme, with the crew, and the troops of Attalus in the garrison; and that they themselves might depart from the city, each with one suit of apparel. [4] When Philip's answer afforded no hopes of accommodation, unless they surrendered at discretion, this repudiation of their embassy so exasperated them, at once through indignation and despair, that, seized with the same kind of fury which had possessed the Saguntines, they ordered all the matrons to [5??] be shut up in the temple of Diana, and the free-born youths and virgins, and even the infants with their nurses, in the place of exercise; the gold and silver to be carried into the forum; [6] their valu- [p. 1358]able garments to be put on board the Rhodian ship, and another from Cyzicum, which lay in the harbour; the priests and victims to be brought, and altars to be erected in the midst. [7] There they appointed a select number, who, as soon as they should see the army of their friends cut off in defending the breach, were instantly to slay their wives and children; to throw into the sea the gold, silver, and apparel that was on board the ships, and to set fire to the buildings, public and private: [8] and to the performance of this deed they were bound by an oath, the priests repeating before them the verses of execration. [9] Those who were of an age capable of fighting, then swore that they would not leave their ranks alive unless victorious. [10] These, regardful of the gods, (by whom they had sworn,) maintained their ground with such obstinacy, that although the night would soon have put a stop to the fight, yet the king, terrified by their fury, first desisted from the fight. [11] The chief inhabitants, to whom the more shocking part of the plan had been given in charge, seeing that few survived the battle, and that these were exhausted by fatigue and wounds, sent the priests (having their heads bound with the fillets of suppliants) at the dawn of the next day to surrender the city to Philip.