Matthew 18:3

"In solemn truth I tell you that unless you turn and become like little children, you will not even enter the kingdom of heaven.

Mark 10:14-15

Jesus was indignant when he saw it, and said: "Let the little children come to me. Do not hinder them; for the kingdom of God belongs to such.

1 Peter 2:2

Like new-born babes long for the pure spiritual milk to make you grow up into salvation;

1 Corinthians 14:20

Brothers, do not become children in understanding; be babes in malice, but in understanding become mature men.

Matthew 19:14

"Let the little children come to me, and forbid them not; for it is to the childlike that the kingdom of heaven belongs."

Matthew 5:20

"For I assure you that unless your righteousness exceed that of the scribes and Pharisees, you will not find entrance into the kingdom of heaven.

Luke 18:16-17

But Jesus called for the babies. "Let the little children come to me," he said, "do not hinder them; for of such is the kingdom of heaven.

Luke 22:32

"But I made supplication for you that your own faith may not fail. And you, when you have turned again, must strengthen your brothers."

Matthew 5:18

"In solemn truth I tell you that until heaven and earth pass away, not an iota, not a comma, will pass from the Law until all has taken place.

Matthew 6:2

"And whatever you give alms, do not sound a trumpet before you as the hypocrites do in the synagogues and streets, in order that men may praise them. In solemn truth I tell you they already have their reward in full.

Matthew 6:5

"And whenever you pray, do not be like the hypocrites. For they love to stand and pray in the synagogues and on the corners of the avenues, in order that men may see them. In solemn truth I tell you that they have their reward in full.

Matthew 6:16

"When you fast, do not look downcast like the hypocrites; for they disfigure their faces so that it may be apparent to men that they are fasting. In solemn truth I tell you, they already have received their reward.

Matthew 13:15

For the heart of his people is made fat, Their ears are dull of hearing; Their eyes, too, have they closed, Lest some day their eyes should perceive, And their ears should hear, And their heart should understand and turn, And I should heal them.

Matthew 19:23

So Jesus said to his disciples. "In solemn truth I tell you that a rich man will find it difficult to enter the kingdom of heaven.

Mark 4:12

so that, "for all their looking they may not see, and for all their hearing, they may not understand, lest perchance they should turn and be pardoned.

Luke 13:24

"Struggle to enter in by the narrow door," he answered, "for I tell you that many will try to enter and not be able,

John 1:51

You shall see greater things than that! Believe me," he added, "you all shall see heaven opened wide, and the angels of God ascending and descending upon the Son of man."

John 3:3

"In very truth I tell you," answered Jesus, "that unless a man is born from above, he cannot see the kingdom of God."

John 3:5

"I tell you solemnly," Jesus answered, "that unless a man is born of water and the Spirit, he cannot enter the kingdom of God.

Acts 3:19

"Repent then! and reform, from the blotting out of your sins, so that there may come times of refreshing from the presence of the Lord;

Acts 14:22

Everywhere they strengthened the souls of the disciples, encouraging them to hold to the faith. "It is through many tribulations," they said, "that we must enter into the kingdom of God."

Acts 28:27

For this people's heart is grown obtuse, Their ears are heavy of hearing, Their eyes have they closed, Lest they should see with their eyes And hear with their ears, Lest they understand with their heart, And turn again, and heal them.

James 5:19-20

My brothers, if any one of you strays from the truth, and some one brings him back,

2 Peter 1:11

For so the entrance into the eternal kingdom of our Lord and Saviour Jesus Christ will be richly 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
Jesus was indignant when he saw it, and said: "Let the little children come to me. Do not hinder them; for the kingdom of God belongs to such.
Luke 18:16
But Jesus called for the babies. "Let the little children come to me," he said, "do not hinder them; for of such is the kingdom of heaven.
1 Corinthians 14:20
Brothers, do not become children in understanding; be babes in malice, but in understanding become mature men.
1 Peter 2:2
Like new-born babes long for the pure spiritual milk to make you grow up into salvation;

General references

Mark 10:15
I tell you true that unless a man receives the kingdom of God as a little child, he shall not even enter it."
Luke 9:46
Now there arose a dispute among them as to which one of them was the greatest.
Luke 22:26
"But you shall not be so. But he who is greater among you let him become like the younger; and he who is leader like him who serves.
Acts 8:19
"Give me, too, this power, so that on whomever I lay my hands, he may receive the Holy Spirit."