Pliny the Elder, Natural History, 28.21-22
“It is not easy to explain whether foreign and unrepeatable words undermine our confidence more than uncommon Latin ones which our mind makes seem ridiculous since it is always casting about for something huge and strong enough to move a god, that is, something to force the mind’s will on divine power.
Homer claims that Ulysses, when he was wounded in the thigh, stopped the flow of blood with a song; Theophrastus says there is a verse to heal sciatica; Cato has passed down a song to help dislocated limbs; Marcus Varro has one for gout. It is reported that the dictator Caesar, after a single severe accident to his vehicle, would, as soon as he took his seat, repeat three times a song for a safe journey—a thing which we know many people do now.”
neque est facile dictu externa verba atque ineffabilia abrogent fidem validius an Latina inopinata et quae inridicula videri cogit animus semper aliquid inmensum exspectans ac dignum deo movendo, immo vero quod numini imperet. dixit Homerus profluvium sanguinis vulnerato femine Ulixen inhibuisse carmine, Theophrastus ischiadicos sanari, Cato prodidit luxatis membris carmen auxiliare, M. Varro podagris. Caesarem dictatorem post unum ancipitem vehiculi casum ferunt semper ut primum consedisset, id quod plerosque nunc facere scimus, carmine ter repetito securitatem itinerum aucupari solitum.
This reminds me of the tradition that granted Pythagoras’ songs healing power:
Porphyry, On the Life of Pythagoras
30. “[Pythagoras] healed psychic and bodily sufferings with rhythm, songs, and incantations. He adapted these treatments to his companions, while he himself heard the harmony of everything because he could understand the unity of the spheres and the harmonies of the stars moving with them. It is not our nature to hear this in the least.”
30. κατεκήλει δὲ ῥυθμοῖς καὶ μέλεσι καὶ ἐπῳδαῖς τὰ ψυχικὰ πάθη καὶ τὰ σωματικά. καὶ τοῖς μὲν ἑταίροις ἡρμόζετο ταῦτα, αὐτὸς δὲ τῆς τοῦ παντὸς ἁρμονίας ἠκροᾶτο συνιεὶς τῆς καθολικῆς τῶν σφαιρῶν καὶ τῶν κατ’ αὐτὰς κινουμένων ἀστέρων ἁρμονίας, ἧς ἡμᾶς μὴ ἀκούειν διὰ σμικρότητα τῆς φύσεως.
32. “Diogenes says that Pythagoras encouraged all men to avoid ambition and lust for fame, because they especially inculcate envy, and also to stay away from large crowds. He used to convene gatherings at his house at dawn himself, accompanying his singing to the lyre and singing some ancient songs of Thales. And he also sang the songs of Hesiod and Homer, as many as appeared to calm his spirit. He would also dance some dances which he believed brought good mobility and health to the body. He used to take walks himself but not with a crowd, taking only two or three companions to shrines or groves, finding the most peaceful and beautiful places.”
32. Διογένης φησὶν ὡς ἅπασι μὲν παρηγγύα φιλοτιμίαν φεύγειν καὶ φιλοδοξίαν, ὥπερ μάλιστα φθόνον ἐργάζεσθαι, ἐκτρέπεσθαι δὲ τὰς μετὰ τῶν πολλῶν ὁμιλίας. τὰς γοῦν διατριβὰς καὶ αὐτὸς ἕωθεν μὲν ἐπὶ τῆς οἰκίας ἐποιεῖτο, ἁρμοζόμενος πρὸς λύραν τὴν ἑαυτοῦ φωνὴν καὶ ᾄδων παιᾶνας ἀρχαίους τινὰς τῶν Θάλητος. καὶ ἐπῇδε τῶν ῾Ομήρου καὶ ῾Ησιόδου ὅσα καθημεροῦν τὴν ψυχὴν ἐδόξαζε. καὶ ὀρχήσεις δέ τινας ὑπωρχεῖτο ὁπόσας εὐκινησίαν καὶ ὑγείαν τῷ σώματι παρασκευάζειν ᾤετο. τοὺς δὲ περιπάτους οὐδ’ αὐτὸς ἐπιφθόνως μετὰ πολλῶν ἐποιεῖτο, ἀλλὰ δεύτερος ἢ τρίτος ἐν ἱεροῖς ἢ ἄλσεσιν, ἐπιλεγόμενος τῶν χωρίων τὰ ἡσυχαίτατα καὶ περικαλλέστατα.
33. “He loved his friends overmuch and was the first to declare that friends possessions are common and that a friend is another self. When they were healthy, he always talked to them; when they were sick, he took care of their bodies. If they were mentally ill, he consoled them, as we said before, some with incantations and spells, others by music. He had songs and paeans for physical ailments: when he sang them, he relieved fatigue. He also could cause forgetfulness of grief, calming of anger, and redirection of desire.”
33.τοὺς δὲ φίλους ὑπερηγάπα, κοινὰ μὲν τὰ τῶν φίλων εἶναι πρῶτος ἀποφηνάμενος, τὸν δὲ φίλον ἄλλον ἑαυτόν. καὶ ὑγιαίνουσι μὲν αὐτοῖς ἀεὶ συνδιέτριβεν, κάμνοντας δὲ τὰ σώματα ἐθεράπευεν, καὶ τὰς ψυχὰς δὲ νοσοῦντας παρεμυθεῖτο, καθάπερ ἔφαμεν, τοὺς μὲν ἐπῳδαῖς καὶ μαγείαις τοὺς δὲ μουσικῇ. ἦν γὰρ αὐτῷ μέλη καὶ πρὸς νόσους σωμάτων παιώνια, ἃ ἐπᾴδων ἀνίστη τοὺς κάμνοντας. ἦν <δ’> ἃ καὶ λύπης λήθην εἰργάζετο καὶ ὀργὰς ἐπράυνε καὶ ἐπιθυμίας ἀτόπους ἐξῄρει.