Passage 2.28.7
καί οἱ ποιήσαντες ἡρῷον τιμὰς καὶ ἄλλας δεδώκασι καὶ ἐπὶ τοῖς πεφυκόσιν ἐλαίοις, καὶ εἰ δή τι ἄλλο δένδρον ἔσω, καθέστηκε νόμος τὰ θραυόμενα μηδένα ἐς οἶκον φέρεσθαι μηδὲ χρᾶσθαί σφισιν ἐς μηδέν, κατὰ χώραν δʼ αὐτοῦ λείπουσιν ἱερὰ εἶναι τῆς Ὑρνηθοῦς.
Those who built the heroön have also granted to Hyrnetho other honors, including a special observance regarding the olive trees growing there and indeed if any other tree stands within: it is established by law that no one may carry home the branches broken from them or make any use whatsoever of them; instead, they leave these branches on the spot, sacred to Hyrnetho.