History of the Peloponnesian War
Thucydides
Thucydides. Historiae, Vol 1-2. Jones, Henry Stuart, editor. Oxford: Oxford University Press, 1910. (1942 printing).
στήλην δὲ ἑκατέρους στῆσαι, τὴν μὲν ἐν Λακεδαίμονι παρ’ Ἀπόλλωνι ἐν Ἀμυκλαίῳ, τὴν δὲ ἐν Ἀθήναις ἐν πόλει παρ’ Ἀθηνᾷ.
ἢν δέ τι δοκῇ Λακεδαιμονίοις καὶ Ἀθηναίοις προσθεῖναι καὶ ἀφελεῖν περὶ τῆς ξυμμαχίας, ὅτι ἂν δοκῇ, εὔορκον ἀμφοτέροις εἶναι.