Herodotus, The Histories

Hdt. 7.220

220.
λέγεται δὲ καὶ ὡς αὐτός σφεας ἀπέπεμψε Λεωνίδης, μὴ ἀπόλωνται κηδόμενος: αὐτῷ δὲ καὶ Σπαρτιητέων τοῖσι παρεοῦσι οὐκ ἔχειν εὐπρεπέως ἐκλιπεῖν τὴν τάξιν ἐς τὴν ἦλθον φυλάξοντες ἀρχήν. [2] ταύτῃ καὶ μᾶλλον τὴν γνώμην πλεῖστος εἰμί, Λεωνίδην, ἐπείτε ᾔσθετο τοὺς συμμάχους ἐόντας ἀπροθύμους καὶ οὐκ ἐθέλοντας συνδιακινδυνεύειν, κελεῦσαι σφέας ἀπαλλάσσεσθαι, αὐτῷ δὲ ἀπιέναι οὐ καλῶς ἔχειν: μένοντι δὲ αὐτοῦ κλέος μέγα ἐλείπετο, καὶ ἡ Σπάρτης εὐδαιμονίη οὐκ ἐξηλείφετο. [3] ἐκέχρηστο γὰρ ὑπὸ τῆς Πυθίης τοῖσι Σπαρτιήτῃσι χρεωμένοισι περὶ τοῦ πολέμου τούτου αὐτίκα κατ᾽ ἀρχὰς ἐγειρομένου, ἢ Λακεδαίμονα ἀνάστατον γενέσθαι ὑπὸ τῶν βαρβάρων ἢ τὴν βασιλέα σφέων ἀπολέσθαι. ταῦτα δέ σφι ἐν ἔπεσι ἑξαμέτροισι χρᾷ λέγοντα ὧδε. [4] “ὑμῖν δ᾽, ὦ Σπάρτης οἰκήτορες εὐρυχόροιο,
ἢ μέγα ἄστυ ἐρικυδὲς ὑπ᾽ ἀνδράσι Περσεΐδῃσι
πέρθεται, ἢ τὸ μὲν οὐχί, ἀφ᾽ Ἡρακλέους δὲ γενέθλης
πενθήσει βασιλῆ φθίμενον Λακεδαίμονος οὖρος.
οὐ γὰρ τὸν ταύρων σχήσει μένος οὐδὲ λεόντων
ἀντιβίην: Ζηνὸς γὰρ ἔχει μένος: οὐδέ ἑ φημί
σχήσεσθαι, πρὶν τῶνδ᾽ ἕτερον διὰ πάντα δάσηται.
” ταῦτά τε δὴ ἐπιλεγόμενον Λεωνίδην, καὶ βουλόμενον κλέος καταθέσθαι μούνων1Σπαρτιητέων, ἀποπέμψαι τοὺς συμμάχους μᾶλλον ἢ γνώμῃ διενειχθέντας οὕτω ἀκόσμως οἴχεσθαι τοὺς οἰχομένους.

1 1


220.
It is said that Leonidas himself sent them away because he was concerned that they would be killed, but felt it not fitting for himself and the Spartans to desert that post which they had come to defend at the beginning. [2] I, however, tend to believe that when Leonidas perceived that the allies were dispirited and unwilling to run all risks with him, he told then to depart. For himself, however, it was not good to leave; if he remained, he would leave a name of great fame, and the prosperity of Sparta would not be blotted out. [3] When the Spartans asked the oracle about this war when it broke out, the Pythia had foretold that either Lacedaemon would be destroyed by the barbarians or their king would be killed. She gave them this answer in hexameter verses running as follows: [4] “For you, inhabitants of wide-wayed Sparta,
Either your great and glorious city must be wasted by Persian men,
Or if not that, then the bound of Lacedaemon must mourn a dead king, from Heracles' line.
The might of bulls or lions will not restrain him with opposing strength; for he has the might of Zeus.
I declare that he will not be restrained until he utterly tears apart one of these.
”

Considering this and wishing to win distinction for the Spartans alone, he sent away the allies rather than have them leave in disorder because of a difference of opinion.
Herodotus, with an English translation by A. D. Godley. Cambridge. Harvard University Press. 1920

http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0126:book%3D7:chapter%3D220