Plato, Laws 843c

χαλεπὴν καὶ σφόδρα πικρὰν γειτονίαν ἀπεργάζονται. διὸ χρὴ πάντως εὐλαβεῖσθαι γείτονα γείτονι μηδὲν ποιεῖν διάφορον, τῶν τε ἄλλων πέρι καὶ δὴ καὶ ἐπεργασίας συμπάσης σφόδρʼ ἀεὶ διευλαβούμενον· τὸ μὲν γὰρ βλάπτειν οὐδὲν χαλεπὸν ἀλλʼ ἀνθρώπου παντός, τὸ δʼ ἐπωφελεῖν οὐδαμῇ ἅπαντος. ὃς δʼ ἂν ἐπεργάζηται τὰ τοῦ γείτονος ὑπερβαίνων τοὺς ὅρους, τὸ μὲν βλάβος ἀποτινέτω, τῆς δὲ ἀναιδείας ἅμα

Wherefore every neighbor must guard most carefully against doing any unfriendly act to his neighbor, and must above all things take special care always not to encroach in the least degree on his land; for whereas it is an easy thing and open to anyone to do an injury, to do a benefit is by no means open to everyone. Whosoever encroaches on his neighbor’s ground, overstepping the boundaries, shall pay for the damage; and, by way of cure for his shamelessness