LXX Gen 9:23

καὶ λαβόντες Σῆμ’ καὶ ἸάΦεθ τὸ ἱμάτιον ἐπέθηκαν ἐπὶ τὰ δύο νῶτα αὐτῶν, καὶ ἐπορεύθησαν ὀπισθοφανῶς καὶ συνεκάλυψαν τὴν γύμνωσιν τοῦ πατρὸς αὐτῶν· καὶ τὸ πρόσωπον αὐτῶν ὀπισθοφανές, καὶ τὴν γύμνωσιν τοῦ πατρὸς αὐτῶν οὐκ ἴδον.

Then Shem and Japheth took a garment and placed it across their shoulders, and walking backward, they covered their father’s nakedness. Their faces were turned away so that they did not see their father’s nakedness.