Matthew 18:3

and said - Verily, I say unto you, Except ye turn and become as the children, in nowise, shall ye enter into the kingdom of the heavens.

Mark 10:14-15

But Jesus, seeing it, was greatly displeased, and said unto them - Suffer the children to come unto me, - do not hinder them; for, of such, is the kingdom of God.

1 Peter 2:2

As new-born babes, for the pure milk that is for the mind, eagerly crave, that, thereby, ye may grow unto salvation: -

1 Corinthians 14:20

Brethren! do not become children, in your understandings; but, in baseness, become babes, while, in your understandings, ye become, full-grown.

Matthew 19:14

But, Jesus, said - Suffer the children - and do not hinder them - to come unto me, - for, of such, is the kingdom of the heavens.

Matthew 5:20

For I say unto you, that, unless your righteousness exceed that of the Scribes and Pharisees, in nowise, may ye enter into the kingdom of the heavens.

Luke 18:16-17

But, Jesus, called them near, saying - Suffer, the children, to be coming unto me, and do not hinder them; for, of such, is the kingdom of God.

Luke 22:32

But, I, have entreated for thee, that thy faith may not fail. And, thou, once thou hast turned, strengthen thy brethren.

Psalm 51:10-13

A pure heart, create for me, O God, And, a steadfast spirit, renew within me.

Isaiah 6:10

Stupefy thou the heart of this people, And their ears, make thou heavy, And their eyes, overspread, - Lest they see with their eyes And with their ears, should hear, And their heart should discern and come back. And they be healed.

Matthew 5:18

For, verily, I say unto you, until the heaven and the earth shall pass away, one least letter, or one point, may in nowise pass away from the law, till all be accomplished.

Matthew 6:2

When, therefore, thou mayest be doing an alms, do not sound a trumpet before thee, just as, the hypocrites, do in the synagogues and in the streets - that they may be glorified by men, - Verily, I say unto you, they are getting back their reward.

Matthew 6:5

And, when ye may be praying, ye shall not be as the hypocrites, because they love, in the synagogues, and at the corners of the broad ways, to take their stand and pray, that they may shine before men; Verily, I say unto you, they are getting back their reward.

Matthew 6:16

And, when ye may he fasting, become not ye, as the hypocrites, of sullen countenance, - for they darken their looks, that they may appear, unto men, to be fasting: Verily, I say unto you, they are getting back their reward.

Matthew 13:15

For the heart of this people hath become dense, and, with their ears, heavily have they heard, and, their eyes, have they closed, - lest, once they should see with their eyes, and, with their ears, should hear, and, with their hearts, should understand, and return; when I would certainly heal them.

Matthew 19:23

And, Jesus, said unto his disciples - Verily, I say unto you, A rich man, with difficulty, shall enter into the kingdom of the heavens.

Mark 4:12

They may surely look and yet not see, and surely hear and yet not understand, lest once they should return and it be forgiven them.

Luke 13:24

Be striving to enter through the narrow door; for, many, I say unto you, will seek to enter, and will not be able, -

John 1:51

And he saith unto him - Verily, verily, I say unto you: Ye shall see heaven - when set open, and, the messengers of God, ascending and descending unto the Son of Man.

John 3:3

Jesus answered, and said unto him - Verily, verily, I say unto thee: Except one be born from above, he cannot see the kingdom of God.

John 3:5

Jesus answered - Verily, verily, I say unto thee: Except one be born of water and spirit, he cannot enter into the kingdom of God.

Acts 3:19

Repent ye, therefore, and turn, - unto the blotting out of your sins; to the end that in that case, there may come seasons of refreshing from the face of the Lord,

Acts 14:22

confirming the souls of the disciples, beseeching them to abide in the faith, and declaring that, through many tribulations, must we enter into the kingdom of God.

Acts 28:27

For the heart of this people, hath become dense, and, with their ears, heavily, have they heard, and, their eyes, have they closed, - lest once they should see with their eyes, and, with their ears, should hear, and, with their hearts, should understand, and return, - when I would certainly heal them.

James 5:19-20

My brethren! If one among you be led to err from the truth, and one turn him back,

2 Peter 1:11

For, thus, shall richly be further supplied unto you - the entrance into the age-abiding 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 it, was greatly displeased, and said unto them - Suffer the children to come unto me, - do not hinder them; for, of such, is the kingdom of God.
Luke 18:16
But, Jesus, called them near, saying - Suffer, the children, to be coming unto me, and do not hinder them; for, of such, is the kingdom of God.
1 Corinthians 14:20
Brethren! do not become children, in your understandings; but, in baseness, become babes, while, in your understandings, ye become, full-grown.
1 Peter 2:2
As new-born babes, for the pure milk that is for the mind, eagerly crave, that, thereby, ye may grow unto salvation: -

General references

Mark 10:15
Verily, I say unto you - Whosoever shall not welcome the kingdom of God, as a child, in nowise shall enter thereinto.
Luke 9:46
But there entered a reasoning among them, as to who of them should be greatest.
Luke 22:26
But, ye, not so! On the contrary - the greater among you, Let him become as, the younger, and, he that governeth, as, he that ministereth,
Acts 8:19
Saying - Give unto me also this authority, - in order that, on whomsoever may lay my hands, he may receive Holy Spirit.