Greek

καὶ ἐξεπλήσσοντο ἐπὶ τῇ διδαχῇ αὐτοῦ ὅτι ἐν ἐξουσίᾳ ἦν ὁ λόγος

Transliterated

kai exeplēssonto epi tē didachē autou hoti en exousia ēn ho logos

Literal English

And they were astonished at the teaching of Him’” - in authority was - word
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