707 Plat. Ion 534d
μέγιστον δὲ τεκμήριον τῷ λόγῳ Τύννιχος ὁ Χαλκιδεύς, ὃς ἄλλο μὲν οὐδὲν πώποτε ἐποίησε ποίημα ὅτου τις ἂν ἀξιώσειεν μνησθῆναι, τὸν δὲ παιῶνα ὃν πάντες ᾄδουσι, σχεδόν τι πάντων μελῶν κάλλιστον, ἀτεχνῶς, ὅπερ αὐτὸς λέγει,
εὕρημά τι Μοισᾶν.
Porph. de abst. 2. 18(p. 148 Nauck)
τὸν γοῦν Αἰσχύλον φασὶ τῶν Δελφῶν ἀξιούντων εἰς τὸν θεὸν γράψαι παιᾶνα εἰπεῖν ὅτι βέλτιστα Τυννίχῳ πεποίηται· παραβαλλόμενον δὲ τὸν αὑτοῦ πρὸς τὸν ἐκείνου ταὐτὸ πείσεσθαι τοῖς ἀγάλμασιν τοῖς καινοῖς πρὸς τὰ ἀρχαῖα.
707 Plato, Ion
My argument is well supported by the case of Tynnichus of Chalcis: he never composed any poem worth remembering with the exception of the paean which everyone sings, almost the most beautiful of all lyric poems and truly, as he himself puts it,
a discovery of the Muses.
Porphyry, On Abstaining from Animal Food
They say that Aeschylus on being asked by the Delphians to write a poem for Apollo answered that Tynnichus had already composed a most beautiful one: in comparison his would fare no better than modern statues by the side of ancient ones.