Matthew 19:14

but Jesus said, let the children alone, and don't hinder them from coming to me: for of such does the gospel-kingdom consist.

Matthew 18:3

and said, I declare to you, except ye lay aside your ambition, and become as children, ye shall not enter into the kingdom of the Messias.

Luke 18:16-17

but Jesus called the children to him, and said to his disciples, let the children come to me, without any hindrance, for they who belong to the kingdom of God, must be like them.

1 Corinthians 14:20

Brethren, be not childish in understanding: be as innocent as babes, but use your understanding like men.

Matthew 11:25

At the same time Jesus, continuing his discourses, said, "I thank thee, O father, Lord of heaven and earth, for having revealed unto babes what thou hast hid from the wise and prudent.

Mark 10:14

which Jesus observing was much displeas'd with them, and said, suffer little children to come unto me, do not hinder them: for of such is the kingdom of God.

1 Peter 2:1-2

Renouncing therefore every kind of malice, and knavery, hypocrisy, envy, and detraction, as new-born infants desire that mystical milk,

Treasury of Scripture Knowledge

Summary

But Jesus said, Suffer little children, and forbid them not, to come unto me: for of such is the kingdom of heaven.

General references

Bible References

Suffer

Mark 10:14
which Jesus observing was much displeas'd with them, and said, suffer little children to come unto me, do not hinder them: for of such is the kingdom of God.
Luke 18:16
but Jesus called the children to him, and said to his disciples, let the children come to me, without any hindrance, for they who belong to the kingdom of God, must be like them.

General references

Matthew 18:2
and Jesus called a child to him, set him in the midst of them,
Mark 9:36
then taking a little child, he set him down before them; and embracing him in his arms, he said to them,