Matthew 18:3

He said: Truly I tell you, if you do not have a change of heart and become like little children, you will not go into the kingdom of heaven.

Mark 10:14-15

But when Jesus saw it he was moved with indignation. He said: Allow the little children to come to me! Do not turn them away for they belong to the kingdom of God.

1 Peter 2:2

Like newborn infants, long for the spiritual milk that is without deception to help you grow to salvation.

1 Corinthians 14:20

Brothers, do not be like children in understanding. When it comes to evil be innocent children but in your thinking be mature adults.

Matthew 19:14

Jesus said: Let the little ones (children) come to me. Do not keep them away: for the kingdom of heaven belongs to such as these.

Psalm 131:2

Surely I am composed and quiet. I am like a weaned child who rests against his mother. Inside of me I am like a weaned child.

Matthew 5:20

I also tell you, your righteousness must be greater than the scribes and Pharisees or you will not enter into the kingdom of heaven.

Luke 18:16-17

Jesus said: Invite the little children to come to me, and do not forbid them for the kingdom of God belongs to them.

Luke 22:32

I prayed for you that your faith would not fail. Once you have turned again strengthen your brothers.

Psalm 51:10-13

Create in me a clean heart, O God, and renew a steadfast (dependable) spirit within me.

Isaiah 6:10

This people's heart has become calloused. They hardly hear with their ears, and they have closed their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn and be healed.(Septuagint)

Matthew 5:18

I solemnly tell you, heaven and earth would pass away before one small letter (detail) will pass away from the Law. All things must be accomplished.

Matthew 6:2

Do not loudly announce it when you give to the poor. The hypocrites do this in the houses of worship and on the streets. They do this to be praised by men. Believe me, they have already been paid in full.

Matthew 6:5

Do not pray like the hypocrites! They want everyone to see them in the houses of worship and on the street corners. I assure you they have been paid in full.

Matthew 6:16

When you abstain from food, do not be like the hypocrites, with sad faces to be seen by men. They have received their reward.

Matthew 13:15

The heart of this people is callous and dull. Their ears are plugged. They cannot hear. They closed their eyes and cannot see. They cannot see nor hear nor understand with their heart. They should turn around and I would heal them.'

Matthew 19:23

Jesus said to his disciples: Truly I tell you, it is hard for a man with much money to go into the kingdom of heaven.

Mark 4:12

So that seeing they may see and not perceive. And hearing they may hear and not understand. Otherwise they might repent and be forgiven.

Luke 13:24

Strive to go in through the narrow door. Many people will try to go in and will not be able.

John 1:51

Jesus continued: You will see the heavens opened and you will see the angels of God ascending and descending upon the Son of man.

John 3:3

Jesus answered: Truly I tell you unless a person is born again (brought forth from above) he cannot see the kingdom of God.

John 3:5

Jesus responded: I tell you truth, except a man be born of water and the spirit he cannot enter into the kingdom of God!

Acts 3:19

Repent therefore, and turn around, that your sins may be blotted out, when the times (seasons) of refreshing shall come from the presence of Jehovah. (Deuteronomy 18:18, 19)

Acts 14:22

They strengthened the disciples and encouraged them to continue in the faith. They said, We must enter the kingdom of God through much tribulation.

Acts 28:27

These people have closed their mind and are hard of hearing. They have shut their eyes so that their eyes never see. Their ears never hear. Their minds never understand. They never turn to me for healing.'

James 5:19-20

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

2 Peter 1:11

For in this way the entrance into the eternal kingdom of our Lord and Savior Jesus Christ will be richly (abundantly) 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
But when Jesus saw it he was moved with indignation. He said: Allow the little children to come to me! Do not turn them away for they belong to the kingdom of God.
Luke 18:16
Jesus said: Invite the little children to come to me, and do not forbid them for the kingdom of God belongs to them.
1 Corinthians 14:20
Brothers, do not be like children in understanding. When it comes to evil be innocent children but in your thinking be mature adults.
1 Peter 2:2
Like newborn infants, long for the spiritual milk that is without deception to help you grow to salvation.

General references

Mark 10:15
Truly I tell you, he who does not receive the kingdom of God like a little child shall not enter it.
Luke 9:46
They reasoned among themselves which of them was the greatest.
Luke 22:26
But you should not be this way. He who is the greater among you let him become as the younger. He that is chief among you is he who serves.
Acts 8:19
Simon said: Give me this power that on whomever I lay hands, he may receive the Holy Spirit.