Matthew 3:3

Oὗτος γάρ ἐστιν ὁ ῥηθεὶς ὑπὸ Ἠσαΐου τοῦ προφήτου λέγοντος, φωνὴ βοῶντος ἐν τῇ ἐρήμῳ, ἑτοιμάσατε τὴν ὁδὸν Kυρίου, εὐθείας ποιεῖτε τὰς τρίβους αὐτοῦ.

For this is he who was spoken of by the prophet Isaiah, saying, “The voice of one crying in the desert, Prepare the way of the LORD, make straight His paths.