Matthew 18:3

And said, Truly I say to you, Except ye be turned, and become as young children, ye should not come into the kingdom of the heavens.

Mark 10:14-15

And Jesus, having seen, felt pain, and said to them, Permit children to come to me, and forbid them not: for of such is the kingdom of God.

1 Peter 2:2

As new born babes, long for the sincere milk pertaining to the word, that ye might be nourished with it:

1 Corinthians 14:20

Brethren, be not children in reflection: but in wickedness act like children, and in reflection be ye perfected.

Matthew 19:14

But Jesus said, Let go the young children, and hinder them not, to come to me: for of such is the kingdom of the heavens.

Psalm 131:2

If I did not place and rest my soul as a child weaned of his Mother: my soul as a weaned child.

Matthew 5:20

For I say to you, That except your justice abound more than the scribes and Pharisees, ye should not come into the kingdom of the heavens.

Luke 18:16-17

And Jesus having called them, said, Leave the young children to come to me, and hinder them not: for of such is time kingdom of God.

Luke 22:32

And I have supplicated for thee that thy faith fail not: and thou, when having turned back, confirm thy brethren.

Psalm 51:10-13

Create for me a clean heart, O God, and renew a steadfast spirit in my midst,

Isaiah 6:10

Make the heart of this people fat and their ears heavy, and blind their eyes, lest they shall see with their eyes and hear with their ears, and their heart shall understand and turn back and be healed to them.

Matthew 5:18

For verily I say to you, Till heaven pass away, and earth, one iota, or one mark, should not pass away from the law, till all should be

Matthew 6:2

When therefore thou doest alms, thou shouldst not sound the trumpet before thee, as hypocrites do in the assemblies, and in the streets, that they might be praised by men. Verily I say to you, They have their reward.

Matthew 6:5

And when thou prayest, thou shalt not be as the hypocrites; for they love in the assemblies, and in the corners of the broad ways to stand praying, so that they might appear to men. Verily I say to you, that they have their reward.

Matthew 6:16

And when ye fast, be not, as hypocrites, of gloomy aspect: for they conceal their faces that they might appear to men fasting. Verily I say to you, That they have their reward.

Matthew 13:15

For the heart of this people has been thickened, and with their ears have they heard heavily, and their eyes have they closed; lest perhaps they should see with the eyes, and hear with the ears, and understand with the heart, and turn back, and I should heal them.

Matthew 19:23

And Jesus said to his disciples, Truly I say to you, That with difficulty shall a rich one come into the kingdom of the heavens.

Mark 4:12

That seeing they might see, and not know; and hearing they might hear, and not understand; lest they turn back, and their sins be remitted to them.

Luke 13:24

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

John 1:51

And he says to him, Amen, amen, I say to you, From henceforth shall ye see heaven opened, and the messengers of God ascending and descending upon the Son of man.

John 3:3

Jesus answered and said to him, Amen, amen, I say to thee, Except any one be born from above, he cannot see the kingdom of God.

John 3:5

Jesus says to him, Truly, truly, I say to thee, Except any one be born of water and of the Spirit, he cannot come into the kingdom of God.

Acts 3:19

Therefore repent, and return, for your sins to be wiped out, so that times of refreshment might come from the face of the Lord;

Acts 14:22

And supporting the souls of the disciples, beseeching to remain in the faith, that through many pressures we must come into the kingdom of God.

Acts 28:27

For the heart of this people was thickened, and with ears heard they heavily, and their eyes they closed; lest they should see with the eyes, and with ears should hear, and with the heart they should understand, and turn back, and I should heal them.

James 5:19-20

Brethren, if any among you be led astray from the truth, and any should turn him back;

2 Peter 1:11

For so shall an entrance be furnished richly to you in addition 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
And Jesus, having seen, felt pain, and said to them, Permit children to come to me, and forbid them not: for of such is the kingdom of God.
Luke 18:16
And Jesus having called them, said, Leave the young children to come to me, and hinder them not: for of such is time kingdom of God.
1 Corinthians 14:20
Brethren, be not children in reflection: but in wickedness act like children, and in reflection be ye perfected.
1 Peter 2:2
As new born babes, long for the sincere milk pertaining to the word, that ye might be nourished with it:

General references

Mark 10:15
Truly I say to you, Whoever should not receive the kingdom of God as a young child, should not come into it.
Luke 9:46
And there came up a conference among them, thus, which of them should be the greatest.
Luke 22:26
And ye not so: but let the greater with you be as the younger; and he leading, as he serving.
Acts 8:19
Saying, Give me also this power, that upon whomsoever I put hands, he might receive the Holy Spirit.