Plato, Laws 925a

διʼ ἀδελφῶν τε καὶ ἀδελφιδῶν ἐπανιόν, ἔμπροσθε μὲν τῶν ἀρρένων, ὕστερον δὲ θηλειῶν ἑνὶ γένει. τὴν δὲ τούτων γάμου χρόνου συμμετρίαν τε καὶ ἀμετρίαν ὁ δικαστὴς σκοπῶν κρινέτω, γυμνοὺς μὲν τοὺς ἄρρενας, γυμνὰς δὲ ὀμφαλοῦ μέχρι θεώμενος τὰς θηλείας· ἐὰν δὲ τοῖς οἰκείοις ἀπορία συγγενῶν ᾖ μέχρι μὲν ἀδελφοῦ ὑιδῶν, μέχρι δὲ πάππου παίδων ὡσαύτως, τῶν ἄλλων ὅντινʼ ἂν ἡ παῖς μετʼ ἐπιτρόπων αἱρῆται τῶν

In like manner, if a man leaves female children, the right of kinship shall proceed always by degrees of consanguinity, going up through brothers and brother’s children, first the males, and secondly the females in one line. The suitability or otherwise of the time of marriage the judge shall decide by inspection, viewing the males naked and the females naked down to the navel. And if there be in the family a lack of kinsmen as far as brother’s grandchildren, and likewise as far as grandfather’s children, whomsoever of the other citizens the girl, aided by her guardians, shall choose, that man (if both he and the girl are willing)