Plato, Laws 843a

τἀκίνητα κινεῖν ἀληθῶς τοῦτο εἶναι· βουλέσθω δὲ πᾶς πέτρον ἐπιχειρῆσαι κινεῖν τὸν μέγιστον ἄλλον πλὴν ὅρον μᾶλλον ἢ σμικρὸν λίθον ὁρίζοντα φιλίαν τε καὶ ἔχθραν ἔνορκον παρὰ θεῶν. τοῦ μὲν γὰρ ὁμόφυλος Ζεὺς μάρτυς, τοῦ δὲ ξένιος, οἳ μετὰ πολέμων τῶν ἐχθίστων ἐγείρονται. καὶ ὁ μὲν πεισθεὶς τῷ νόμῳ ἀναίσθητος τῶν ἀπʼ αὐτοῦ κακῶν γίγνοιτʼ ἄν, καταφρονήσας δὲ διτταῖς δίκαις ἔνοχος ἔστω, μιᾷ μὲν παρὰ θεῶν καὶ πρώτῃ, δευτέρᾳ δὲ ὑπὸ νόμου.

(in case he holds adjoining land on a frontier), realizing that to do this is truly to be guilty of moving the sacrosanct; sooner let a man try to move the largest rock which is not a boundary-mark than a small stone which forms a boundary, sanctioned by Heaven, between friendly and hostile ground. For of the one kind Zeus the Clansmen’s god is witness, of the other Zeus the Strangers’ god; which gods, when aroused, bring wars most deadly. He that obeys the law shall not suffer the evils which it inflicts; but whoso despises it shall be liable to a double penalty, the first from the hand of Heaven, the second from the law. No one shall