LXX Gen 7:2

ἀπὸ δὲ τῶν κτηνῶν τῶν καθαρῶν εἰσάγαγε πρὸς σὲ ἑπτὰ ἑπτὰ ἄρσεν καὶ θῆλυ, ἀπὸ δὲ τῶν κτηνῶν τῶν μὴ καθαρῶν δύο δύο ἄρσεν καὶ θῆλυ·

You are to take with you seven pairs of every kind of clean animal, a male and its mate; a pair of every kind of unclean animal, a male and its mate;