Passage 8.9.7
ἐνομίσθη δὲ καὶ Ἀντίνους σφίσιν εἶναι θεός· τῶν δὲ ἐν Μαντινείᾳ νεώτατός ἐστιν ὁ τοῦ Ἀντίνου ναός. οὗτος ἐσπουδάσθη περισσῶς δή τι ὑπὸ βασιλέως Ἀδριανοῦ· ἐγὼ δὲ μετʼ ἀνθρώπων μὲν ἔτι αὐτὸν ὄντα οὐκ εἶδον, ἐν δὲ ἀγάλμασιν εἶδον καὶ ἐν γραφαῖς. ἔχει μὲν δὴ γέρα καὶ ἑτέρωθι, καὶ ἐπὶ τῷ Νείλῳ πόλις Αἰγυπτίων ἐστὶν ἐπώνυμος Ἀντίνου· τιμὰς δὲ ἐν Μαντινείᾳ κατὰ τοιόνδε ἔσχηκε. γένος ἦν ὁ Ἀντίνους ἐκ Βιθυνίου τῆς ὑπὲρ Σαγγαρίου ποταμοῦ· οἱ δὲ Βιθυνιεῖς Ἀρκάδες τέ εἰσι καὶ Μαντινεῖς τὰ ἄνωθεν.
Antinous was also considered by them to be a god; the newest temple in Mantineia is indeed that of Antinous. He was exceedingly honored by Emperor Hadrian. I myself never saw him while he yet lived among men, but I have seen him represented in statues and pictures. He receives honors elsewhere as well; an Egyptian city beside the Nile is named after Antinous. His honors at Mantineia arose from the following circumstance: Antinous was of Bithynian origin, from the land across the river Sangarius; and the Bithynians themselves are Arcadians and Mantineans by descent.