Lucian of Samosata Alexander 19

[19] When it was time to carry out the purpose for which the whole scheme had been concocted—that is to say, to make predictions and give oracles to those who sought them—taking his cue from Amphilochus in Cilicia, who, as you know, after the death and disappearance of his father Amphiaraus at Thebes, ¹ was exiled from his own country, went to Cilicia, and got on very well by foretelling the future, like his father, for the Cilicians and getting two obols for each prediction—taking, as I say, his cue from him, Alexander announced to all comers that the god would make prophecies, and named a date for it in advance. He directed everyone to write down in a scroll whatever he wanted and what he especially wished to learn, to tie it up, and to seal it with wax or clay or something else of that sort. Then he himself, after taking the scrolls and entering the inner sanctuary—for by that time the temple had been erected and the stage set—proposed to summon in order, with herald and priest, those who had submitted them, and after the god told him about each case, to give back the scroll with the seal upon it, just as it was, and the reply to it endorsed upon it; for the god would reply explicitly to any question that anyone should put.