Isaiah 32:4

And the heart of those hastened Understandeth to know, And the tongue of stammerers hasteth to speak clearly.

Isaiah 29:24

And the erring in spirit have known understanding, And murmurers learn doctrine!'

Exodus 4:11

And Jehovah saith unto him, 'Who appointed a mouth for man? or who appointeth the dumb, or deaf, or open, or blind? is it not I, Jehovah?

Nehemiah 8:8-12

and they read in the book, in the law of God, explaining -- so as to give the meaning, and they give understanding to the convocation.

Song of Songs 7:9

And thy palate as the good wine -- 'Flowing to my beloved in uprightness, Strengthening the lips of the aged!

Matthew 11:25

At that time Jesus answering said, 'I do confess to Thee, Father, Lord of the heavens and of the earth, that thou didst hide these things from wise and understanding ones, and didst reveal them to babes.

Matthew 16:17

And Jesus answering said to him, 'Happy art thou, Simon Bar-Jona, because flesh and blood did not reveal it to thee, but my Father who is in the heavens.

Luke 21:14-15

'Settle, then, to your hearts, not to meditate beforehand to reply,

Acts 2:4-12

and they were all filled with the Holy Spirit, and began to speak with other tongues, according as the Spirit was giving them to declare.

Acts 4:13

And beholding the openness of Peter and John, and having perceived that they are men unlettered and plebeian, they were wondering -- they were taking knowledge also of them that with Jesus they had been --

Acts 6:7

And the word of God did increase, and the number of the disciples did multiply in Jerusalem exceedingly; a great multitude also of the priests were obedient to the faith.

Acts 26:9-11

I, indeed, therefore, thought with myself, that against the name of Jesus of Nazareth it behoved me many things to do,

Galatians 1:23

and only they were hearing, that 'he who is persecuting us then, doth now proclaim good news -- the faith that then he was wasting;'

Treasury of Scripture Knowledge

Summary

The heart also of the rash shall understand knowledge, and the tongue of the stammerers shall be ready to speak plainly.

General references

Bible References

Heart

Isaiah 29:24
And the erring in spirit have known understanding, And murmurers learn doctrine!'
Nehemiah 8:8
and they read in the book, in the law of God, explaining -- so as to give the meaning, and they give understanding to the convocation.
Matthew 11:25
At that time Jesus answering said, 'I do confess to Thee, Father, Lord of the heavens and of the earth, that thou didst hide these things from wise and understanding ones, and didst reveal them to babes.
Matthew 16:17
And Jesus answering said to him, 'Happy art thou, Simon Bar-Jona, because flesh and blood did not reveal it to thee, but my Father who is in the heavens.
Acts 6:7
And the word of God did increase, and the number of the disciples did multiply in Jerusalem exceedingly; a great multitude also of the priests were obedient to the faith.
Acts 26:9
I, indeed, therefore, thought with myself, that against the name of Jesus of Nazareth it behoved me many things to do,
Galatians 1:23
and only they were hearing, that 'he who is persecuting us then, doth now proclaim good news -- the faith that then he was wasting;'

General references

Mark 7:35
and immediately were his ears opened, and the string of his tongue was loosed, and he was speaking plain.