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

[97] Now none of the populace durst not only make a reply, but durst not so much as get upon the wall, for it was all taken up by the robbers, who were also the guard at the gates, in order to prevent any of the rest from going out, in order to propose terms of submission, and from receiving any of the horsemen into the city. But John returned Titus this answer: That for himself he was content to hearken to his proposals, and that he would either persuade or force those that refused them. Yet he said that Titus ought to have such regard to the Jewish law, as to grant them leave to celebrate that day, which was the seventh day of the week, on which it was unlawful not only to remove their arms, but even to treat of peace also; and that even the Romans were not ignorant how the period of the seventh day was among them a cessation from all labors; and that he who should compel them to transgress the law about that day would be equally guilty with those that were compelled to transgress it: and that this delay could be of no disadvantage to him; for why should any body think of doing any thing in the night, unless it was to fly away? which he might prevent by placing his camp round about them; and that they should think it a great point gained, if they might not be obliged to transgress the laws of their country; and that it would be a right thing for him, who designed to grant them peace, without their expectation of such a favor, to preserve the laws of those they saved inviolable. Thus did this man put a trick upon Titus, not so much out of regard to the seventh day as to his own preservation, for he was afraid lest he should be quite deserted if the city should be taken, and had his hopes of life in that night, and in his flight therein. Now this was the work of God, who therefore preserved this John, that he might bring on the destruction of Jerusalem; as also it was his work that Titus was prevailed with by this pretense for a delay, and that he pitched his camp further off the city at Cydessa. This Cydessa was a strong Mediterranean village of the Tyrians, which always hated and made war against the Jews; it had also a great number of inhabitants, and was well fortified, which made it a proper place for such as were enemies to the Jewish nation.