The best fighters among the Indians, however, were mercenaries, and they used to go about to the different cities and defend them sturdily, and wrought much harm to Alexander's cause. Therefore, after he had made a truce with them in a certain city and allowed them to depart, he fell upon them as they marched and slew them all.
Edition :
Plutarch. Plutarch's Lives. with an English Translation by. Bernadotte Perrin. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1919. 7.