In 3.38, Herodotus mentions the Indian tribe of the Callatiae for their practice of funerary cannibalism; in a striking illustration of cultural relativism, he points out that this people is just as dismayed at the notion of the Greeks practicing cremation as the Greeks are at that of eating their dead parents. In book 7 (7.65,70,86,187) and in 8.113 Herodotus describes the Indian infantry and cavalry employed in Xerxes' army.