Matthew 7:26

Kαὶ πᾶς ὁ ἀκούων μου τοὺς λόγους τούτους, καὶ μὴ ποιῶν αὐτοὺς, ὁμοιωθήσεται ἀνδρὶ μωρῷ, ὅστις ᾠκοδόμησε τὴν οἰκίαν αὐτοῦ ἐπὶ τὴν ἄμμον·

And everyone who hears these words of mine, and does not do them will be likened to a foolish man who built his house on the sand.