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

[150] When Athaliah unexpectedly heard the tumult and the acclamations, she was greatly disturbed in her mind, and suddenly issued out of the royal palace with her own army; and when she was come to the temple, the. priests received her; but as for those that stood round about the temple, as they were ordered by the high priest to do, they hindered the armed inert that followed her from going in. But when Athaliah saw the child standing upon a pillar, with the royal crown upon his head, she rent her clothes, and cried out vehemently, and commanded [her guards] to kill him that had laid snares for her, and endeavored to deprive her of the government. But Jehoiada called for the captains of hundreds, and commanded them to bring Athaliah to the valley of Cedron, and slay her there, for he would not have the temple defiled with the punishments of this pernicious woman; and he gave order, that if any one came near to help her, he should be slain also; wherefore those that had the charge of her slaughter took hold of her, and led her to the gate of the king's mules, arid slew her there.