From the Paradoxagraphus Palatinus Admiranda 20
“Antigonos says [of sheep intestines] that those of rams are voiceless, but those from females can sing. This fact has not escaped the poet, for he says “He stretched the seven strings from female sheep.”
Επὶ τῶν <ἐντέρων τῶν> προβάτων φησὶν ᾿Αντίγονος τὰ μὲν τῶν κριῶν ἄφωνα εἶναι, τὰ δὲ τῶν θηλέων ἔμφωνα· οὐ λεληθέναι δὲ τοῦτο τὸν ποιητήν. φησὶ γάρ· ἑπτὰ δὲ θηλυτέρων οἴων ἐτανύσσατο χορδάς.
This last line is a variant for the Homeric Hymn to Hermes 51
“He stretched out seven symphonic sheep-gut strings”
ἑπτὰ δὲ συμφώνους ὀΐων ἐτανύσσατο χορδάς.