Parallel
Exodus 19:11
Rahlfs Septuagint (1935) · Berean Standard Bible
καὶ ἔστωσαν ἕτοιμοι εἰς τὴν ἡμέραν τὴν τρίτην τῇ γὰρ ἡμέρᾳ τῇ τρίτῃ καταβήσεται κύριος ἐπὶ τὸ ὄρος τὸ Σινα ἐναντίον παντὸς τοῦ λαοῦ
and be prepared by the third day, for on the third day the LORD will come down on Mount Sinai in the sight of all the people.