Passage 8.35.4
λέγουσι μὲν δὴ οἱ Ἀρκάδες τὴν Βελεμίναν τῆς σφετέρας οὖσαν τὸ ἀρχαῖον ἀποτεμέσθαι Λακεδαιμονίους· λέγειν δὲ οὐκ εἰκότα ἐφαίνοντό μοι καὶ ἄλλων ἕνεκα καὶ μάλιστα ὅτι μοι δοκοῦσι Θηβαῖοι μηδʼ ἂν τοῦτο ἐλασσουμένους περιιδεῖν τοὺς Ἀρκάδας, εἴ σφισιν ἔσεσθαι σὺν τῷ δικαίῳ τὸ ἐπανόρθωμα ἔμελλεν.
The Arcadians indeed say that Belemina was once theirs, but was detached from their territory by the Lacedaemonians. This claim seemed improbable to me for several reasons, most especially because the Thebans, in my view, would not have allowed the Arcadians to be deprived even of this possession, if they could have expected justice to be on their side in recovering it.