Matthew 18:3

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

Mark 10:14-15

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

1 Peter 2:2

As newborn babes, desire the pure milk of the word, that you may grow thereby:

1 Corinthians 14:20

Brethren, be not children in understanding: but in malice be children, but in understanding be men.

Matthew 19:14

But Jesus said, Allow little children, and forbid them not, to come unto me: for of such is the kingdom of heaven.

Psalm 131:2

Surely I have behaved and quieted myself, as a child that is weaned of his mother: my soul is even as a weaned child.

Matthew 5:20

For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, you shall in no case enter into the kingdom of heaven.

Luke 18:16-17

But Jesus called them unto him, and said, Allow 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 you, that your faith fail not: and when you have returned, strengthen your brethren.

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 dull, 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 return, and be healed.

Matthew 5:18

For verily I say unto you, Till heaven and earth pass away, one jot or one tittle shall in no wise pass from the law, till all be fulfilled.

Matthew 6:2

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

Matthew 6:5

And when you pray, you shall not be as the hypocrites are: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.

Matthew 6:16

Moreover when you fast, be not, as the hypocrites, of a sad countenance: for they disfigure their faces, that they may appear unto men to fast. Verily I say unto you, They have their reward.

Matthew 13:15

For this people's heart has become gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.

Matthew 19:23

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

Mark 4:12

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

Luke 13:24

Strive to enter in at the narrow gate: for many, I say unto you, will seek to enter in, and shall not be able.

John 1:51

And he said unto him, Verily, verily, I say unto you, Hereafter you shall 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 say unto you, Except a man be born again, he cannot see the kingdom of God.

John 3:5

Jesus answered, Verily, verily, I say unto you, Except 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, when the times of refreshing shall come from the presence of the Lord;

Acts 14:22

Confirming the souls of the disciples, and exhorting them to continue in the faith, and that we must through much tribulation enter into the kingdom of God.

Acts 28:27

For the heart of this people is stubborn, and their ears are dull of hearing, and their eyes have they closed; lest they should see with their eyes, and hear with their ears, and understand with their heart, and should be converted, and I should heal them.

James 5:19-20

Brethren, if any of you do err from the truth, and one convert him;

2 Peter 1:11

For so an entrance shall be provided unto you abundantly into the everlasting 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 much displeased, and said unto them, Allow the little children to come unto me, and forbid them not: for of such is the kingdom of God.
Luke 18:16
But Jesus called them unto him, and said, Allow little children to come unto me, and forbid them not: for of such is the kingdom of God.
1 Corinthians 14:20
Brethren, be not children in understanding: but in malice be children, but in understanding be men.
1 Peter 2:2
As newborn babes, desire the pure milk of the word, that you 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 not enter therein.
Luke 9:46
Then there arose a reasoning among them, as to which of them should be greatest.
Luke 22:26
But you shall not be so: but he that is greatest among you, let him be as the younger; and he that is chief, as he that does serve.
Acts 8:19
Saying, Give me also this power, that on whomsoever I lay hands, he may receive the Holy Spirit.