Plato, Laws 924d

ἡ χρεία τῶν παίδων αὐτοῦ μετεχέτω· θηλείας δὲ ἂν καταλείπῃ τις ἀπροσδοκήτῳ τύχῃ χρησάμενος, συγγνώμην τῷ τιθέντι τὸν νόμον ἐχέτω, ἐὰν τῶν τριῶν αὐτοῦ πρὸς τὰ δύο ἐπισκοπῶν τὴν ἔκδοσιν τῶν θυγατέρων ποιῆται, πρός τε τὴν τοῦ γένους ἀγχιστείαν καὶ τὴν τοῦ κλήρου σωτηρίαν, τὸ δὲ τρίτον, ὅπερ ἂν πατὴρ διασκέψαιτο, ἐξ ἁπάντων τῶν πολιτῶν βλέπων εἰς ἤθη τε καὶ τρόπους τὸν ἐπιτήδειον αὑτῷ μὲν ὑόν, νυμφίον

And if a man meets with some unforeseen mischance and leaves daughters, he shall pardon the lawgiver if he regulates the betrothal of the daughters with an eye to two points out of three—namely, nearness of kinship and the security of the lot—and omits the third point, which a father would take into consideration,—namely, the selecting out of all the citizens of a person suited by character and conduct to be a son to himself and a spouse for daughter,—if, I say, the lawgiver passes this over owing to the impossibility of taking it into consideration.