Plato, Laws 922c

πρὶν διατίθεσθαι μέλλειν, εἴ τις ἐξουσίαν δώσει ἁπλῶς οὕτως κυρίαν εἶναι διαθήκην ἣν ἄν τις διαθῆται ὁπωσοῦν ἔχων πρὸς τῷ τοῦ βίου τέλει. ἀνοήτως γὰρ δὴ καὶ διατεθρυμμένως τινὰ τρόπον ἔχομεν οἱ πλεῖστοι, ὅταν ἤδη μέλλειν ἡγώμεθα τελευτᾶν. πῶς τοῦτο, ὦ ξένε, λέγεις; χαλεπόν ἐστʼ, ὦ Κλεινία, μέλλων ἄνθρωπος τελευτήσειν, καὶ μεστὸν λόγου τοῖς νομοθέταις εὖ μάλα φοβεροῦ καὶ δυσχεροῦς. πῇ;

if any will that a man makes were to be granted absolute and unconditional validity, no matter what his state of mind at the end of his life. For most of us are more or less in a dull and enfeebled state of mind, when we imagine that we are nearly at the point of death. What do you mean by this, Stranger? A man at the point of death, Clinias, is a difficult subject, and overflowing with speech that is most alarming and vexatious to a lawgiver. How so? Since he claims to be lord of all he has, he is wont