Nemean 1.60

comment on the seer Teiresias, who declares the will of Zeus, being described as 'prophētēs of Zeus' – a relic of an earlier and undifferentiated stage when Teiresias was generally known as a mantis (the middleman between the source of inspiration and the prophētēs, the recomposer of the inspired message in poetic form), that is the stage where the prophētēs was the mantis