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

[150] Upon this the people were greatly disturbed at what they saw, and at what they heard, as never having had the experience of such a thing before; so they gathered themselves to Shiloh, out of a prodigious and a just anger, and assembling in a great congregation before the tabernacle, they immediately resolved to take arms, and to treat the inhabitants of Gibeah as enemies; but the senate restrained them from doing so, and persuaded them, that they ought not so hastily to make war upon people of the same nation with them, before they discoursed them by words concerning the accusation laid against them; it being part of their law, that they should not bring an army against foreigners themselves, when they appear to have been injurious, without sending an ambassage first, and trying thereby whether they will repent or not: and accordingly they exhorted them to do what they ought to do in obedience to their laws, that is, to send to the inhabitants of Gibeah, to know whether they would deliver up the offenders to them, and if they deliver them up, to rest satisfied with the punishment of those offenders; but if they despised the message that was sent them, to punish them by taking, up arms against them. Accordingly they sent to the inhabitants of Gibeah, and accused the young men of the crimes committed in the affair of the Levite's wife, and required of them those that had done what was contrary to the law, that they might be punished, as having justly deserved to die for what they had done; but the inhabitants of Gibeah would not deliver up the young men, and thought it too reproachful to them, out of fear of war, to submit to other men's demands upon them; vaunting themselves to be no way inferior to any in war, neither in their number nor in courage. The rest of their tribe were also making great preparation for war, for they were so insolently mad as also to resolve to repel force by force.