IG 14.1292 ii 11, see above.
ἐποιήθη δὲ ἐς τὸν πόλεμον τοῦτον καὶ ἔπη Θηβαΐς. τὰ δὲ ἔπη ταῦτα Καλλῖνος ἀφικόμενος αὐτῶν ἐς μνήμην ἔφησεν Ὅμηρον τὸν ποιήσαντα εἶναι· Καλλίνωι δὲ πολλοί τε καὶ ἄξιοι λόγου κατὰ ταὐτὰ ἔγνωσαν. ἐγὼ δὲ τὴν ποίησιν ταύτην μετά γε Ἰλιάδα καὶ τὰ ἔπη τὰ ἐς Ὀδυσσέα ἐπαινῶ μάλιστα.
Ps.-Herod. Vita Homeri 9
κατήμενος δὲ ἐν τῶι σκυτείωι, παρεόντων καὶ ἄλλων, τήν τε ποίησιν αὐτοῖς ἐπεδείκνυτο, Ἀμφιάρεώ τε τὴν ἐξελασίαν τὴν ἐς Θήβας, καὶ τοὺς ὕμνους τοὺς ἐς θεοὺς πεποιημένους αὐτῶι.
Borgia plaque, see above.
Pausanias, Description of Greece
There was also an epic composed about this war, the Thebaid. Callinus in referring to this epic said that Homer was its author, and many worthy critics have agreed with Callinus. I myself rate this poem the best after the Iliad and the Odysseus epic.
Pseudo-Herodotus, Life of Homer
As he sat in the cobbler’s shop, with others also present, he would perform his poetry for them, Amphiaraus’ Expedition to Thebes, and the Hymns that he had composed to the gods.