Greek

Ἐγένετο δὲ ἐν τῷ βαπτισθῆναι ἅπαντα τὸν λαὸν καὶ Ἰησοῦ βαπτισθέντος προσευχομένου ἀνεῳχθῆναι οὐρανὸν

Transliterated

egeneto de en tō baptisthēnai hapanta ton laon kai Iēsou baptisthentos proseuchomenou aneōchthēnai ouranon

Literal English

Came however in - to be baptized everything the people And of Jesus having been baptized having prayed was opened heaven
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