Isaiah 32:4

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

Isaiah 29:24

They also who err in spirit shall come to understanding, and those who murmur shall receive instruction.

Exodus 4:11

And LORD said to him, Who has made man's mouth? Or who makes [a man] dumb, or deaf, or seeing, or blind? Is it not I, LORD?

Nehemiah 8:8-12

And they read in the book, in the law of God, distinctly, and they gave the sense, so that they understood the reading.

Song of Songs 7:9

and thy mouth like the best wine, that goes down smoothly for my beloved, gliding through the lips and teeth.

Matthew 11:25

Jesus having responded at that time, said, I extol thee, O Father, Lord of the heaven and the earth, because thou hid these things from the wise and intelligent, and revealed them to the childlike.

Matthew 16:17

And having answered, Jesus said to him, Blessed are thou, Simon Bar-jonah, because flesh and blood has not revealed it to thee, but my Father in the heavens.

Luke 21:14-15

Settle therefore in your hearts not to premeditate to make defense.

Acts 2:4-12

And they were all filled of Holy Spirit, and began to speak with other tongues, as the Spirit gave them to declare.

Acts 4:13

Now when they saw the boldness of Peter and John, and having perceived that they are illiterate and uneducated men, they marveled. And they recognized them, that they had been with Jesus.

Acts 6:7

And the word of God increased, and the number of the disciples multiplied greatly in Jerusalem, and a large company of the priests were obedient to the faith.

Acts 26:9-11

Indeed therefore I thought it necessary for myself to do many things contrary to the name of Jesus the Nazarene,

Galatians 1:23

but they were only hearing that the man who once persecuted us now preaches the good-news, the faith that he once ravaged.

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
They also who err in spirit shall come to understanding, and those who murmur shall receive instruction.
Nehemiah 8:8
And they read in the book, in the law of God, distinctly, and they gave the sense, so that they understood the reading.
Matthew 11:25
Jesus having responded at that time, said, I extol thee, O Father, Lord of the heaven and the earth, because thou hid these things from the wise and intelligent, and revealed them to the childlike.
Matthew 16:17
And having answered, Jesus said to him, Blessed are thou, Simon Bar-jonah, because flesh and blood has not revealed it to thee, but my Father in the heavens.
Acts 6:7
And the word of God increased, and the number of the disciples multiplied greatly in Jerusalem, and a large company of the priests were obedient to the faith.
Acts 26:9
Indeed therefore I thought it necessary for myself to do many things contrary to the name of Jesus the Nazarene,
Galatians 1:23
but they were only hearing that the man who once persecuted us now preaches the good-news, the faith that he once ravaged.

General references

Mark 7:35
And straightaway his ears were opened, and the bond of his tongue was loosened, and he spoke plainly.