Parallel
Exodus 28:31
Swete's Septuagint · Berean Standard Bible
καὶ ἔσται Ἀαρὼν ἐν τῷ λειτουργεῖν ἀκουστὴ ἡ φωνὴ αὐτοῦ, εἰσιόντι εἰς τὸ ὅ́γιον ἐναντίον κυρίου καὶ ἐξιόντι, ἵνα μὴ ἀποθάνῃ.
You are to make the robe of the ephod entirely of blue cloth,