Matthew 18:4

4Whoeverὅστιςthereforeοὖνwill humbleταπεινώσειhimselfἑαυτὸνasὡςtheτὸlittle childπαιδίονthisτοῦτο,heοὗτόςisἐστινtheὁgreatestμείζωνinἐνtheτῇkingdomβασιλείᾳof theτῶνheavensοὐρανῶν·

Therefore whoever will humble himself like this little child, he is the greatest in the kingdom of the heavens.