Plato, Laws 844a

πόλεως κοσμητὴν νομοθετεῖν· ἐπεὶ καὶ τῶν ὑδάτων πέρι γεωργοῖσι παλαιοὶ καὶ καλοὶ νόμοι κείμενοι οὐκ ἄξιοι παροχετεύειν λόγοις, ἀλλʼ ὁ βουληθεὶς ἐπὶ τὸν αὑτοῦ τόπον ἄγειν ὕδωρ ἀγέτω μὲν ἀρχόμενος ἐκ τῶν κοινῶν ναμάτων, μὴ ὑποτέμνων πηγὰς φανερὰς ἰδιώτου μηδενός, ᾗ δʼ ἂν βούληται ἄγειν, πλὴν διʼ οἰκίας ἢ ἱερῶν τινων ἢ καὶ μνημάτων, ἀγέτω, μὴ βλάπτων πλὴν αὐτῆς τῆς ὀχεταγωγίας.

Thus, regarding water-supplies also, there are excellent old laws laid down for farmers, which we, in our exposition, need not draw upon. Let this suffice:—he that desires to bring water to his own land may do so, commencing at the public cisterns, but he must not undercut the exposed wells of any private person: he may lead it by whatever way he wishes, except through a house, temple or tomb, and he must do no damage beyond the actual work of channelling. If, in any spot, the rain-water filters through owing to the natural dryness of the soil,