Matthew 18:3

and said, “Truly I say to you, unless you are converted and become like children, you will not enter the kingdom of heaven.

Mark 10:14-15

But when Jesus saw this, He was indignant and said to them, “Permit the children to come to Me; do not hinder them; for the kingdom of God belongs to such as these.

1 Peter 2:2

like newborn babies, long for the pure milk of the word, so that by it you may grow in respect to salvation,

1 Corinthians 14:20

Brethren, do not be children in your thinking; yet in evil be infants, but in your thinking be mature.

Matthew 19:14

But Jesus said, Let the children alone, and do not hinder them from coming to Me; for the kingdom of heaven belongs to such as these.”

Psalm 131:2

Surely I have composed and quieted my soul;
Like a weaned child rests against his mother,
My soul is like a weaned child within me.

Matthew 5:20

“For I say to you that unless your righteousness surpasses that of the scribes and Pharisees, you will not enter the kingdom of heaven.

Luke 18:16-17

But Jesus called for them, saying, “Permit the children to come to Me, and do not hinder them, for the kingdom of God belongs to such as these.

Luke 22:32

but I have prayed for you, that your faith may not fail; and you, when once you have turned again, strengthen your brothers.”

Psalm 51:10-13

Create in me a clean heart, O God,
And renew a steadfast spirit within me.

Isaiah 6:10

Render the hearts of this people insensitive,
Their ears dull,
And their eyes dim,
Otherwise they might see with their eyes,
Hear with their ears,
Understand with their hearts,
And return and be healed.”

Matthew 5:18

For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished.

Matthew 6:2

“So when you give to the poor, do not sound a trumpet before you, as the hypocrites do in the synagogues and in the streets, so that they may be honored by men. Truly I say to you, they have their reward in full.

Matthew 6:5

“When you pray, you are not to be like the hypocrites; for they love to stand and pray in the synagogues and on the street corners so that they may be seen by men. Truly I say to you, they have their reward in full.

Matthew 6:16

Whenever you fast, do not put on a gloomy face as the hypocrites do, for they neglect their appearance so that they will be noticed by men when they are fasting. Truly I say to you, they have their reward in full.

Matthew 13:15

For the heart of this people has become dull,
With their ears they scarcely hear,
And they have closed their eyes,
Otherwise they would see with their eyes,
Hear with their ears,
And understand with their heart and return,
And I would heal them.’

Matthew 19:23

And Jesus said to His disciples, “Truly I say to you, it is hard for a rich man to enter the kingdom of heaven.

Mark 4:12

so that while seeing, they may see and not perceive, and while hearing, they may hear and not understand, otherwise they might return and be forgiven.”

Luke 13:24

Strive to enter through the narrow door; for many, I tell you, will seek to enter and will not be able.

John 1:51

And He *said to him, “Truly, truly, I say to you, you will see the heavens opened and the angels of God ascending and descending on the Son of Man.”

John 3:3

Jesus answered and said to him, “Truly, truly, I say to you, unless one is born again he cannot see the kingdom of God.”

John 3:5

Jesus answered, “Truly, truly, I say to you, unless one is born of water and the Spirit he cannot enter into the kingdom of God.

Acts 3:19

Therefore repent and return, so that your sins may be wiped away, in order that times of refreshing may come from the presence of the Lord;

Acts 14:22

strengthening the souls of the disciples, encouraging them to continue in the faith, and saying, “Through many tribulations we must enter the kingdom of God.”

Acts 28:27

For the heart of this people has become dull,
And with their ears they scarcely hear,
And they have closed their eyes;
Otherwise they might see with their eyes,
And hear with their ears,
And understand with their heart and return,
And I would heal them.”’

James 5:19-20

My brethren, if any among you strays from the truth and one turns him back,

2 Peter 1:11

for in this way the entrance into the eternal kingdom of our Lord and Savior Jesus Christ will be abundantly supplied to you.

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 this, He was indignant and said to them, “Permit the children to come to Me; do not hinder them; for the kingdom of God belongs to such as these.
Luke 18:16
But Jesus called for them, saying, “Permit the children to come to Me, and do not hinder them, for the kingdom of God belongs to such as these.
1 Corinthians 14:20
Brethren, do not be children in your thinking; yet in evil be infants, but in your thinking be mature.
1 Peter 2:2
like newborn babies, long for the pure milk of the word, so that by it you may grow in respect to salvation,

General references

Mark 10:15
Truly I say to you, whoever does not receive the kingdom of God like a child will not enter it at all.”
Luke 9:46
An argument started among them as to which of them might be the greatest.
Luke 22:26
But it is not this way with you, but the one who is the greatest among you must become like the youngest, and the leader like the servant.
Acts 8:19
saying, “Give this authority to me as well, so that everyone on whom I lay my hands may receive the Holy Spirit.”