Matthew 18:3

“I assure you,” He said, “unless you are converted and become like children, you will never enter the kingdom of heaven.

Mark 10:14-15

When Jesus saw it, He was indignant and said to them, “Let the little children come to Me. Don’t stop them, for the kingdom of God belongs to such as these.

1 Peter 2:2

Like newborn infants, desire the pure spiritual milk, so that you may grow by it for your salvation,

1 Corinthians 14:20

Brothers, don’t be childish in your thinking, but be infants in regard to evil and adult in your thinking.

Matthew 19:14

Then Jesus said, “Leave the children alone, and don’t try to keep them from coming to Me, because the kingdom of heaven is made up of people like this.”

Psalm 131:2

Instead, I have calmed and quieted myself
like a little weaned child with its mother;
I am like a little child.

Matthew 5:20

For I tell you, unless your righteousness surpasses that of the scribes and Pharisees, you will never enter the kingdom of heaven.

Luke 18:16-17

Jesus, however, invited them: “Let the little children come to Me, and don’t stop them, because 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 you have turned back, strengthen your brothers.”

Psalm 51:10-13

God, create a clean heart for me
and renew a steadfast spirit within me.

Isaiah 6:10

Dull the minds of these people;
deafen their ears and blind their eyes;
otherwise they might see with their eyes
and hear with their ears,
understand with their minds,
turn back, and be healed.

Matthew 5:18

For I assure you: Until heaven and earth pass away, not the smallest letter or one stroke of a letter will pass from the law until all things are accomplished.

Matthew 6:2

So whenever you give to the poor, don’t sound a trumpet before you, as the hypocrites do in the synagogues and on the streets, to be applauded by people. I assure you: They’ve got their reward!

Matthew 6:5

“Whenever you pray, you must not be like the hypocrites, because they love to pray standing in the synagogues and on the street corners to be seen by people. I assure you: They’ve got their reward!

Matthew 6:16

“Whenever you fast, don’t be sad-faced like the hypocrites. For they make their faces unattractive so their fasting is obvious to people. I assure you: They’ve got their reward!

Matthew 13:15

For this people’s heart has grown callous;
their ears are hard of hearing,
and they have shut their eyes;
otherwise they might see with their eyes
and hear with their ears,
understand with their hearts
and turn back—
and I would cure them.

Matthew 19:23

Then Jesus said to His disciples, “I assure you: It will be hard for a rich person to enter the kingdom of heaven!

Mark 4:12

so that

they may look and look,
yet not perceive;
they may listen and listen,
yet not understand;
otherwise, they might turn back—
and be forgiven.

Luke 13:24

“Make every effort to enter through the narrow door, because I tell you, many will try to enter and won’t be able

John 1:51

Then He said, “I assure you: You will see heaven opened and the angels of God ascending and descending on the Son of Man.”

John 3:3

Jesus replied, “I assure you: Unless someone is born again, he cannot see the kingdom of God.”

John 3:5

Jesus answered, “I assure you: Unless someone is born of water and the Spirit, he cannot enter the kingdom of God.

Acts 3:19

Therefore repent and turn back, so that your sins may be wiped out, that seasons of refreshing may come from the presence of the Lord,

Acts 14:22

strengthening the disciples by encouraging them to continue in the faith and by telling them, “It is necessary to pass through many troubles on our way into the kingdom of God.”

Acts 28:27

For the hearts of these people
have grown callous,
their ears are hard of hearing,
and they have shut their eyes;
otherwise they might see with their eyes
and hear with their ears,
understand with their heart,
and be converted,
and I would heal them.

James 5:19-20

My brothers, if any among you strays from the truth, and someone turns him back,

2 Peter 1:11

For in this way, entry into the eternal kingdom of our Lord and Savior 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
When Jesus saw it, He was indignant and said to them, “Let the little children come to Me. Don’t stop them, for the kingdom of God belongs to such as these.
Luke 18:16
Jesus, however, invited them: “Let the little children come to Me, and don’t stop them, because the kingdom of God belongs to such as these.
1 Corinthians 14:20
Brothers, don’t be childish in your thinking, but be infants in regard to evil and adult in your thinking.
1 Peter 2:2
Like newborn infants, desire the pure spiritual milk, so that you may grow by it for your salvation,

General references

Mark 10:15
I assure you: Whoever does not welcome the kingdom of God like a little child will never enter it.”
Luke 9:46
Then an argument started among them about who would be the greatest of them.
Luke 22:26
But it must not be like that among you. On the contrary, whoever is greatest among you must become like the youngest, and whoever leads, like the one serving.
Acts 8:19
saying, “Give me this power too, so that anyone I lay hands on may receive the Holy Spirit.”

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.