Passage 7.12.4
Λακεδαιμόνιοι περὶ ἀμφισβητησίμου χώρας καταφεύγουσιν ἐπὶ τὴν Ῥωμαίων βουλήν· καταφεύγουσι δὲ αὐτοῖς προεῖπεν ἡ βουλὴ δικάζεσθαι τὰ ἄλλα πλὴν ψυχῆς ἐν συνεδρίῳ τῷ Ἀχαιῶν. ἡ μὲν δὴ ταῦτα ἀπεκρίνατο· Δίαιος δὲ οὐ τὸν ὄντα ἔλεγεν Ἀχαιοῖς λόγον, ψυχαγωγῶν δὲ αὐτοὺς ἔφασκε παρὰ τῆς Ῥωμαίων σφίσιν ἐφεῖσθαι βουλῆς καὶ θάνατον ἀνδρὸς καταγνῶναι τῶν ἐκ Σπάρτης.
The Lacedaemonians appealed to the Roman Senate regarding a disputed territory. But the Roman Senate had already previously instructed them to have their disputes judged by the Achaean assembly, in all issues except those involving capital punishment. Such was the Senate's response; Diaeus, however, did not truthfully report this to the Achaeans, but deceiving them, he claimed that the Roman Senate had granted them authority even to pronounce a sentence of death against a man from Sparta.