He also buried the Persian commanders and the Greek mercenaries who were killed fighting on the side of the enemy. But as many of them as he took prisoners he bound in fetters and sent them away to Macedonia to till the soil, because, though they were Greeks, they were fighting against Greece on behalf of the foreigners in opposition to the decrees which the Greeks had made in their federal council. To Athens also he sent 300 suits of Persian armour to be hung up in the Acropolis as a votive offering to Athena, and ordered this inscription to be fixed over them, "Alexander, son of Philip, and all the Greeks except the Lacedaemonians, present this offering from the spoils taken from the foreigners inhabiting Asia
Anabasis Alexandri I, 16, 7.
Your ancestors invaded Macedonia and the rest of Greece and did us great harm, though we had done them no prior injury; … [and] I have been appointed leader of the Greeks …
Arrian mentions with admiration that every Indian is free. With them, as with the Lacedemonians, he says, no native can be a slave; but unlike the Lacedemonians, they keep no other people in servitude.
The History of India, by Mountstuart Elphinstone (Indica, ch. X and Ephinstone's India p. 239).