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

[73] So Nabash, contemning the multitude of the Gileadites and the answer they gave, allowed them a respite, and gave them leave to send to whomsoever they pleased for assistance. So they immediately sent to the Israelites, city by city, and informed them what Nabash had threatened to do to them, and what great distress they were in. Now the people fell into tears and grief at the hearing of what the ambassadors from Jabesh said; and the terror they were in permitted them to do nothing more. But when the messengers were come to the city of king Saul, and declared the dangers in which the inhabitants of Jabesh were, the people were in the same affliction as those in the other cities, for they lamented the calamity of those related to them. And when Saul was returned from his husbandry into the city, he found his fellow citizens weeping; and when, upon inquiry, he had learned the cause of the confusion and sadness they were in, he was seized with a divine fury, and sent away the ambassadors from the inhabitants of Jabesh, and promised them to come to their assistance on the third day, and to beat their enemies before sun-rising, that the sun upon its rising might see that they had already conquered, and were freed from the fears they were under: but he bid some of them stay to conduct them the right way to Jabesh.