Parallel
Luke 9:29
Patriarchal Greek New Testament (1904) · Berean Standard Bible
καὶ ἐγένετο ἐν τῷ προσεύχεσθαι αὐτὸν τὸ εἶδος τοῦ προσώπου αὐτοῦ ἕτερον καὶ ὁ ἱματισμὸς αὐτοῦ λευκὸς ἐξαστράπτων.
And as He was praying, the appearance of His face changed, and His clothes became radiantly white.