Greek

τὸ βάπτισμα Ἰωάννου πόθεν ἦν; ἐξ οὐρανοῦ ἢ ἀνθρώπων; Οἱ δὲ διελογίζοντο ἐν ἑαυτοῖς λέγοντες Ἐὰν εἴπωμεν Ἐξ ἐρεῖ ἡμῖν Διὰ τί οὖν οὐκ ἐπιστεύσατε αὐτῷ;

Transliterated

to baptisma Iōannou pothen ēn ex ouranou ē anthrōpōn hoi de dielogizonto en heautois legontes Ean eipōmen Ex erei hēmin Dia ti oun ouk episteusate autō

Literal English

the [a] baptism John how was it? out of air or men? - however they were reasoning in themselves saying If we should say From He will say to us Because of Which therefore not did you believe Him?
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