Matthew 18:3

and said, Verily I say unto you, Except ye be changed and be as little children, ye shall in no wise enter into the kingdom of heaven.

Mark 10:14-15

But when Jesus saw it, he felt indignation, and said to them, Permit little children to come to me, and hinder them not; for of such is the kingdom of heaven.

1 Peter 2:2

as new-born babes desire earnestly the unadulterated milk of the word, that ye may grow thereby:

1 Corinthians 14:20

Brethren, be not children in your minds: though in naughtiness be ye children, but in your minds be men complete.

Matthew 19:14

Then said Jesus, Permit little children, and hinder them not from coming to me; for of such is the kingdom of heaven.

Matthew 5:20

For I say unto you, That except your righteousness abounds more than that of the scribes and Pharisees, ye shall in no wise enter into the kingdom of heaven.

Luke 18:16-17

But Jesus calling them to him, said, Permit little children to come to me, and hinder 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 returned, stablish thy brethren.

Matthew 5:18

For I tell you assuredly, that till heaven and earth pass away, not one iota, or the smallest stroke of a letter, shall pass from the law, until all things shall be accomplished.

Matthew 6:2

Therefore when thou givest alms, sound not a trumpet before thee, as the hypocrites do, in the synagogues, and in the streets, that they may have glory from men. Verily I say unto you, They receive their reward.

Matthew 6:5

And when thou prayest, be not as the hypocrites: for they love standing in the synagogues and at the corners of the streets, to pray, that they may make a shew to men. Verily I say unto you, That they have their reward.

Matthew 6:16

And when ye fast, be not as the hypocrites, affecting a gloomy look: for they disfigure their visages, that they may make a shew of fasting to men. Verily I say unto you, That they have their reward.

Matthew 13:15

for the heart of this people is waxed gross, and with their ears they have heard heavily, and their eyes they have closed; lest at any time they should see with the eves, and hear with the ears, and understand with the heart, and be converted, and I should heal them.

Matthew 19:23

Then Jesus said to his disciples, Verily I say unto you, That very difficultly shall a rich man enter into the kingdom of heaven.

Mark 4:12

That seeing they may see, yet not perceive; and hearing may hear, yet not understand; lest at any time they should be converted, and their sins be forgiven them.

Luke 13:24

Exert all your powers to enter through the strait gate: for many, I tell you, will seek to enter, but will not be able.

John 1:51

And he saith to him, Verily, verily, I tell you, From henceforth ye shall see heaven opened, and the angels of God ascending and descending upon the Son of man.

John 3:3

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

John 3:5

Jesus replied, Verily, verily, I say unto thee, Except a man be born of water and the Spirit, he cannot enter into the kingdom of God.

Acts 3:19

Repent ye therefore, and be converted, that your sins may be blotted out, when refreshing seasons shall come from the presence of the Lord;

Acts 14:22

strengthening the souls of the brethren, exhorting them to abide firm in the faith, and that through many afflictions we must pass into the kingdom of heaven.

Acts 28:27

For the heart of this people is waxed gross, and with their ears they are thick of hearing, and their eyes have they shut; lest at any time they should see with their eyes, and hear with their ears, and understand with their hearts, and become converts, and I should heal them."

James 5:19-20

Brethren, if any man among you should have erred from the truth, and one convert him;

2 Peter 1:11

but an entrance will thus be richly afforded you into the eternal 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
But when Jesus saw it, he felt indignation, and said to them, Permit little children to come to me, and hinder them not; for of such is the kingdom of heaven.
Luke 18:16
But Jesus calling them to him, said, Permit little children to come to me, and hinder them not for of such is the kingdom of God.
1 Corinthians 14:20
Brethren, be not children in your minds: though in naughtiness be ye children, but in your minds be men complete.
1 Peter 2:2
as new-born babes desire earnestly the unadulterated milk of the word, that ye may grow thereby:

General references

Mark 10:15
Verily I say unto you, Whosoever shall not receive the kingdom of God as a little child, he shall in nowise enter into it.
Luke 9:46
Then a dispute sprang up among them, which of them should be the greatest.
Luke 22:26
But ye shall not act thus: but the superior among you, let him be as the junior; and he that presideth, as he that serveth.
Acts 8:19
saying, Confer on me also this power, that on whomsoever I lay my hands, they may receive the Holy Ghost.