LXX Gen 47:24

καὶ ἱστᾶι τὰ γενήματα αὐτῆς, δώσετε τὸ πέρπτον μέρος τῷ Φαραώ· τὰ δὲ τέσσερα μέρη ἔσται ὑμῖν αὐτοῖς εἰς σπέρμα τῇ γῇ καὶ εἰς βρῶσιν ὑμῖν καὶ πᾶσιν τοῖς οἴκοις ὑμῶν.

At harvest time, you are to give a fifth of it to Pharaoh, and four-fifths will be yours as seed for the field and food for yourselves and your households and children.”