Matthew 18:3

and said, Verily I declare unto you, unless ye be converted, and become like little children, ye shall never enter into the kingdom of heaven.

Mark 10:14-15

Which Jesus observing, was much displeased, and said to them, Let the children come to me; and hinder them not; for of such is the kingdom of God.

1 Peter 2:2

and envies, and all evil-speakings, as new-born babes desire that rational milk which is without guile, that ye may grow thereby:

1 Corinthians 14:20

My brethren, be not children in sense: but in malice be infants, and in your judgements shew yourselves to be men.

Matthew 19:14

but Jesus said, Suffer the children to come to me, and do not hinder them: for of such is the kingdom of heaven.

Matthew 5:20

For I tell you, that unless your righteousness exceed that of the scribes and pharisees, ye shall not enter into the kingdom of heaven.

Luke 18:16-17

But Jesus called them to Him and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God.

Luke 22:32

but I have prayed for thee, that thy faith may not fail; and when thou art converted, strengthen thy brethren.

Matthew 5:18

for verily I say unto you, Till heaven and earth pass away, not one jot nor one tittle shall pass from the law, till all be compleated.

Matthew 6:2

Therefore when thou dost an alms-deed, do not proclaim it abroad, as the hypocrites do, in the synagogues, and in the streets, that they may be applauded by men. Verily I tell you, they have their reward.

Matthew 6:5

And when thou prayest, be not like the hypocrites; for they love to pray in public assemblies, and in the corners of the streets, that they may be taken notice of by men. Verily I say unto you, they have their reward.

Matthew 6:16

And when ye fast, be not, like the hypocrites, of a gloomy countenance; for they disfigure their faces, that they may be observed by men to fast: I tell you, they have indeed their reward.

Matthew 13:15

and their ears are dull of hearing, and they have closed their eyes; least they should see at all with their eyes, and hear with their ears, and understand with their heart, and be converted, and I should heal them.

Matthew 19:23

Then said Jesus to his disciples, Verily I tell you, that a rich man shall with difficulty enter into the kingdom of heaven:

Mark 4:12

that in seeing they may see and not perceive, and in hearing they may hear and not understand, least they should be converted, and their sins be forgiven them.

Luke 13:24

But He said unto them, Strive to enter in at the strait gate; for I tell you, many will desire to enter in, and shall not be able.

John 1:51

And He saith unto him, Verily verily I say unto you, Ye shall hereafter see heaven opened, and the angels of God ascending and descending upon the Son of man.

John 3:3

Jesus answered and said unto him, Verily verily I tell thee, Unless a man be born again, he cannot see the kingdom of God.

John 3:5

Jesus answered, I tell thee of a truth, Unless a man be born of water and of the Spirit, he cannot enter into the kingdom of God.

Acts 3:19

Repent therefore and be converted, that your sins may be blotted out: that seasons of refreshing may come upon you from the presence of the Lord;

Acts 14:22

confirming the souls of the disciples, exhorting them to continue in the faith, and telling them that through many afflictions we must enter into the kingdom of God.

Acts 28:27

and they hear heavily with their ears, and have closed their eyes; least they should see at all with their eyes, and hear with their ears, and understand with their heart, and be converted, and I should heal them.

James 5:19-20

Brethren, if any among you be seduced from the truth, and one convert him;

2 Peter 1:11

For so an entrance shall be administered unto you abundantly into the everlasting kingdom of our Lord and Saviour Jesus Christ.

Treasury of Scripture Knowledge

Summary

And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.

Bible References

And become

Mark 10:14
Which Jesus observing, was much displeased, and said to them, Let the children come to me; and hinder them not; for of such is the kingdom of God.
Luke 18:16
But Jesus called them to Him and said, Suffer little children to come unto me, and forbid them not: for of such is the kingdom of God.
1 Corinthians 14:20
My brethren, be not children in sense: but in malice be infants, and in your judgements shew yourselves to be men.
1 Peter 2:2
and envies, and all evil-speakings, as new-born babes desire that rational milk which is without guile, that ye may grow thereby:

General references

Mark 10:15
Verily I tell you, Whosoever shall not receive the kingdom of God as a little child, shall by no means enter into it.
Luke 9:46
Then a dispute rose among them, which of them should be greatest.
Luke 22:26
But ye shall not do so: but let the greatest among you be as the younger; and he that presides as he that serveth.
Acts 8:19
saying, Give me also this power, that on whomsoever I lay hands, he may receive the holy Spirit.