Titus Livius (Livy), The History of Rome, Book 31
Evan T. Sage, Ph.D. Professor of Latin and Head of the Department of Classics in the University of Pittsburgh, Ed.

42. Philip ordered the recall sounded as his men approached the rampart; for men and horses were wearied less by the battle than by the length and especially the excessive speed of the march. [2] So he ordered the cavalry by troops, the companies of light infantry in succession, to go to get water and to take their [3] meal, and kept some on guard under arms, as he awaited the column of infantry which moved more slowly on account of the weight of their equipment. [4] When they arrived, they too were ordered to set up their standards, stack their arms, and take a hasty meal, only two or three from each company at a time being sent for water; meanwhile the cavalry and light infantry stood ready in formation in case the enemy should make any move. [5] The Aetolians —for now even those who had been scattered through the country had returned to camp —stationed armed guards around the gates and wall to defend the fortification, while, themselves in high spirits, they watched from safety their inactive foes. [6] After the Macedonian standards were moved and the soldiers arrayed and formed for battle began to approach the wall, all suddenly left their posts and fled through the rear part of the camp to the hill and the camp of the Athamanes. Many of the Aetolians were killed or captured in their headlong flight. [7] If enough of the day had remained, Philip could without doubt have driven the Athamanes also from their [p. 125]camp, but having used up the day in fighting and¹ then in plundering the camp, he bivouacked in a nearby plain beneath the hill, intending to attack the enemy at the following dawn. [8] But the Aetolians, still in the grip of the panic in which they had left their own camp, during the ensuing night fled in every direction. Amynander was of the greatest service, under whose leadership the Athamanes who knew the roads led them back to Aetolia over the mountains by paths unknown to the pursuing enemy. [9] Aimless wandering in the disorderly flight threw no large number into the hands of the Macedonian cavalry, whom Philip had sent out to harass the enemy's column when at daybreak he saw the hill deserted.