Greek

καὶ εἶπεν Ἀμὴν λέγω ὑμῖν ἐὰν μὴ στραφῆτε γένησθε ὡς τὰ παιδία οὐ εἰσέλθητε εἰς τὴν βασιλείαν τῶν οὐρανῶν

Transliterated

kai eipen Amēn legō hymin ean mē straphēte genēsthe hōs ta paidia ou eiselthēte eis tēn basileian tōn ouranōn

Literal English

And said Truly I say to you if not you turn you may be as the little children not you enter for the kingdom of the heavens:
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