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

[260] And now, since Caesar was no way able to restrain the enthusiastic fury of the soldiers, and the fire proceeded on more and more, he went into the holy place of the temple, with his commanders, and saw it, with what was in it, which he found to be far superior to what the relations of foreigners contained, and not inferior to what we ourselves boasted of and believed about it. But as the flame had not as yet reached to its inward parts, but was still consuming the rooms that were about the holy house, and Titus supposing what the fact was, that the house itself might yet he saved, he came in haste and endeavored to persuade the soldiers to quench the fire, and gave order to Liberalius the centurion, and one of those spearmen that were about him, to beat the soldiers that were refractory with their staves, and to restrain them; yet were their passions too hard for the regards they had for Caesar, and the dread they had of him who forbade them, as was their hatred of the Jews, and a certain vehement inclination to fight them, too hard for them also. Moreover, the hope of plunder induced many to go on, as having this opinion, that all the places within were full of money, and as seeing that all round about it was made of gold. And besides, one of those that went into the place prevented Caesar, when he ran so hastily out to restrain the soldiers, and threw the fire upon the hinges of the gate, in the dark; whereby the flame burst out from within the holy house itself immediately, when the commanders retired, and Caesar with them, and when nobody any longer forbade those that were without to set fire to it. And thus was the holy house burnt down, without Caesar's approbation.