Lycurgus (22.5-23.1)

When they had conquered and routed an enemy, they pursued him far enough to make their victory secure by his flight, and then at once retired, thinking it ignoble and unworthy of a Hellene to hew men to pieces who had given up the fight and abandoned the field. And this was not only a noble and magnanimous policy, but it was also useful. For their antagonists, knowing that they slew those who resisted them, but showed mercy to those who yielded to them, were apt to think flight more advantageous than resistance.

Hippias the Sophist says that Lycurgus himself was very well versed in war and took part in many campaigns, and Philostephanus attributes to him the arrangement of the Spartan cavalry by oulamoi, explaining that the oulamos, as constituted by him, was a troop of fifty horsemen in a square formation. But Demetrius the Phalerean says he engaged in no warlike undertakings, and established his constitution in a time of peace.