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

[35] But the people, upon these injuries offered to their former constitution and government by the prophet's sons, were very uneasy at their actions, and came running to the prophet, who then lived at the city Ramah, and informed him of the transgressions of his sons; and said, That as he was himself old already, and too infirm by that age of his to oversee their affairs in the manner he used to do, so they begged of him, and entreated him, to appoint some person to be king over them, who might rule over the nation, and avenge them of the Philistines, who ought to be punished for their former oppressions. These words greatly afflicted Samuel, on account of his innate love of justice, and his hatred to kingly government, for he was very fond of an aristocracy, as what made the men that used it of a divine and happy disposition; nor could he either think of eating or sleeping, out of his concern and torment of mind at what they had said, but all the night long did he continue awake and revolved these notions in his mind.