Passage 4.27.2
Λακεδαιμονίων δὲ ἐπὶ στρατοπέδου Διοσκούροις ἑορτὴν ἀγόντων καὶ ἤδη πρὸς πότον καὶ παιδιὰς τετραμμένων μετὰ τὸ ἄριστον, ὁ Γώνιππος καὶ ὁ Πάνορμος χιτῶνας λευκοὺς καὶ χλαμύδας πορφυρᾶς ἐνδύντες ἐπί τε ἵππων τῶν καλλίστων ὀχούμενοι καὶ ἐπὶ ταῖς κεφαλαῖς πίλους, ἐν δὲ ταῖς χερσὶ δόρατα ἔχοντες ἐπιφαίνονται Λακεδαιμονίοις. οἱ δὲ ὡς εἶδον, προσεκύνουν τε καὶ εὔχοντο, ἀφῖχθαι δοκοῦντές σφισιν αὐτοὺς ἐς τὴν θυσίαν τοὺς Διοσκούρους.
While the Lacedaemonians were celebrating a festival in honor of the Dioscuri in their encampment, and had already turned after the midday meal toward drinking and amusements, Gonippus and Panormus appeared before them, dressed in white tunics and purple cloaks, riding upon most distinguished horses, with piloi on their heads and holding spears in their hands. When the Lacedaemonians saw them, they worshipped and prayed, thinking that the Dioscuri themselves had arrived at their sacrifice.