Matthew 18:3

and said, Truly I say unto you, unless you may be converted, and become as little children, you can not enter into the kingdom of the heavens.

Mark 10:14-15

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

1 Peter 2:2

like newly born babes, desire the pure milk of the word, in order that you may grow thereby unto salvation:

1 Corinthians 14:20

Brethren, be not children in intellect: but be infants in evil, but be perfect in intellect.

Matthew 19:14

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

Matthew 5:20

For I say unto you, that if your righteousness may not abound more than that of the scribes and Pharisees, you can not enter into the kingdom of the heavens.

Luke 18:16-17

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

Luke 22:32

but I prayed for you, that your faith may not fail you: and thou, when having turned, strengthen thy brethren:

Matthew 5:18

For truly I say unto you, Until heaven and earth may pass away, one jot or tittle can not pass from the law, until all things may be accomplished.

Matthew 6:2

therefore when you may do alms, do not sound a trumpet before you, as the hypocrites do in the synagogues and in the streets, in order that they may be glorified by the people: truly I say unto you, They exhaust their reward.

Matthew 6:5

And when you pray, be not like the hypocrites: because they love to pray standing in the synagogues and in the corners of the streets, in order that they may appear unto the people. Truly I say unto you, They exhaust their reward.

Matthew 6:16

And when you may fast, be not like the hypocrites, of a sad contenance: for they disfigure their faces, in order that they may appear unto the people fasting. Truly I say unto you, They exhaust their reward.

Matthew 13:15

Because the heart of this people is waxed gross, and they heard heavily with their ears, and closed their eyes; lest they may see with their eyes, and hear with their ears, and understand with their hearts, and turn, and I shall heal them.

Matthew 19:23

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

Mark 4:12

in order that seeing they may see, and not know; and hearing they may hear, and not understand; lest they may turn, and their sins may he forgiven unto them.

Luke 13:24

Agonize to enter in through the narrow gate: because many, I say unto you, will seek to enter in, and will not be able.

John 1:51

And He says to him, Truly, truly, I say unto you, you shall see heaven open, and the angels of God ascending and descending upon the Son of man.

John 3:3

Jesus responded and said to him, Truly, truly, I say unto thee, unless any one may be born from above, he is not able to see the kingdom of God.

John 3:5

Jesus responded, Truly, truly, I say unto thee, Unless any one may be born of water and Spirit, he is not able to enter into the kingdom of the heavens.

Acts 3:19

Repent, therefore, and turn, that your sins may be blotted out, in order that seasons of soul-renewing may come from the presence of the Lord,

Acts 14:22

strengthening the souls of the disciples, exhorting them to abide in the faith, and it behooves them through many tribulations to enter into the kingdom of God.

Acts 28:27

for the heart of this people is waxed gross, and they heard with their ears heavily, and closed their eyes; lest they may see with their eyes, and hear with their ears, and understand with their heart, and turn, and I shall heal them.

James 5:19-20

My brethren, if any one among you may err from the truth, and one may turn him back;

2 Peter 1:11

For in this way an entrance will be administered unto you abundantly 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 Jesus seeing was displeased, and said to them, Suffer the little children to come unto me; and forbid them not: for of such is the kingdom of God.
Luke 18:16
And Jesus calling them to Him, said, Suffer the 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 intellect: but be infants in evil, but be perfect in intellect.
1 Peter 2:2
like newly born babes, desire the pure milk of the word, in order that you may grow thereby unto salvation:

General references

Mark 10:15
Truly, I say unto you, Whosoever may not receive the kingdom of God as a little child, can not enter into it.
Luke 9:46
And a dispute came in among them, as to which one of them might be the greater.
Luke 22:26
But you are not thus: but let the greater among you be as the younger; and the leader as the waiter.
Acts 8:19
Give me this power, that on whomsoever I may lay hands, he may receive the Holy Ghost.