Matthew 18:3

And he said, Truly I say to you, if ye are not turned, and become as children, ye will, no, not enter into the kingdom of the heavens.

Mark 10:14-15

But when Jesus saw it, he was displeased, and said to them, Allow the children to come to me. Forbid them not, for of such is the kingdom of God.

1 Peter 2:2

as newborn babes, long for the genuine intellectual milk, so that ye may grow by it,

1 Corinthians 14:20

Brothers, become not children in your thoughts. Instead be childlike in wickedness, but in your thoughts become mature.

Matthew 19:14

But Jesus said, Allow the children, and do not forbid them to come to me, for of such kind is the kingdom of the heavens.

Psalm 131:2

Surely I have stilled and quieted my soul like a weaned child with his mother. Like a weaned child is my soul within me.

Matthew 5:20

For I say to you, that unless your righteousness abounds more than of the scholars and Pharisees, ye will, no, not enter into the kingdom of the heavens.

Luke 18:16-17

But having summoned them, Jesus said, Allow the children to come to me, and do not forbid them, for of such is the kingdom of God.

Luke 22:32

but I prayed for thee, so that thy faith may not fail. And thou, when thou have returned, strengthen thy brothers.

Psalm 51:10-13

Create in me a clean heart, O God, and renew a right spirit within me.

Isaiah 6:10

Make the heart of this people fat, and make their ears heavy, and shut their eyes, lest they see with their eyes, and hear with their ears, and understand with their heart, and turn, and be healed.

Matthew 5:18

For truly I say to you, until the heaven and the earth pass away, one iota or one tittle will, no, not pass away from the law, until all things come to pass.

Matthew 6:2

When therefore thou do charity, do not sound a trumpet before thee, as the hypocrites do in the synagogues and in the streets, so that they may have glory by men. Truly I say to you, they have their reward.

Matthew 6:5

And when thou pray, thou shall not be as the hypocrites, because they love to pray having stood in the synagogues and in the corners of the thoroughfares, so that they may be seen by men. Truly I say to you, they have their reward.

Matthew 6:16

And when ye fast, become not like the gloomy looking hypocrites, for they make their faces unsightly, so that they may appear fasting to men. Truly I say to you, they have their reward.

Matthew 13:15

For this people's heart became fat, and their ears hear heavily, and their eyes are shut, lest they should see with their eyes, and hear with their ears, and understand with their heart, and should turn, and I will heal them.

Matthew 19:23

And Jesus said to his disciples, Truly I say to you, that a rich man will enter into the kingdom of the heavens difficultly.

Mark 4:12

So that seeing they may see, and not perceive, and hearing they may hear, and not understand, lest they should turn, and the sins would be forgiven them.

Luke 13:24

Compete to enter in by the narrow gate, because many, I say to you, will seek to enter in, and will not be able.

John 1:51

And he says to him, Truly, truly, I say to you, henceforth ye will see the heaven opened, and the agents of God ascending and descending upon the Son of man.

John 3:3

Jesus answered and said to him, Truly, truly, I say to thee, If any man is not begotten from above, he cannot see the kingdom of God.

John 3:5

Jesus answered, Truly, truly, I say to thee, If any man is not begotten from water and Spirit, he cannot enter into the kingdom of God.

Acts 3:19

Repent ye therefore, and be converted in order to wipe away your sins, so that times of refreshing may come from the presence of the Lord.

Acts 14:22

strengthening the souls of the disciples, exhorting them to continue in the faith, and that it was necessary for us to enter into the kingdom of God through many tribulations.

Acts 28:27

For this people's heart was made fat, and they hear heavily with the ears. And they shut their eyes, lest they may perceive with the eyes, and hear with the ears, and understand with the heart, and should turn, and I would heal the

James 5:19-20

Brothers, if any man among you may be led astray from the truth, and some man converts him,

2 Peter 1:11

For so the entrance will be furnished to you abundantly into the eternal kingdom of our Lord and Savior 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 was displeased, and said to them, Allow the children to come to me. Forbid them not, for of such is the kingdom of God.
Luke 18:16
But having summoned them, Jesus said, Allow the children to come to me, and do not forbid them, for of such is the kingdom of God.
1 Corinthians 14:20
Brothers, become not children in your thoughts. Instead be childlike in wickedness, but in your thoughts become mature.
1 Peter 2:2
as newborn babes, long for the genuine intellectual milk, so that ye may grow by it,

General references

Mark 10:15
Truly I say to you, whoever will not receive the kingdom of God as a child, he will, no, not enter it.
Luke 9:46
But a thought entered among them, which of them may be greater.
Luke 22:26
But ye are not this way. Rather, the greater among you, shall become as the newer, and he who leads, as he who serves.
Acts 8:19
saying, Give me also this power, so that on whomever I lay hands, he may receive Holy Spirit.