Isaiah 32:4

And [the] {minds} of [the] rash will understand {knowledge}, and [the] tongues of stammerers will hasten to speak clearly.

Isaiah 29:24

And those who err [in] spirit will {acquire} understanding, and those who grumble will learn instruction.

Exodus 4:11

And Yahweh said to him, "Who gave a mouth to humankind, or who makes mute or deaf or sighted or blind? [Is it] not I, Yahweh?

Nehemiah 8:8-12

So they read the book from the law of God, making it clear and giving the meaning so that they could understand the reading.

Song of Songs 7:9

Your palate [is] like the best wine that goes down for my beloved, smoothly gliding over my lips and teeth.

Matthew 11:25

At that time Jesus answered [and] said, "I praise you, Father, Lord of heaven and earth, because you have hidden these [things] from the wise and intelligent, and have revealed them to young children.

Matthew 16:17

And Jesus answered [and] said to him, "Blessed are you, Simon son of Jonah, because flesh and blood did not reveal [this] to you, but my Father [who is] in heaven.

Luke 21:14-15

{Therefore make up your minds} not to prepare in advance to speak in your own defense,

Acts 2:4-12

And they were all filled with the Holy Spirit and began to speak in other languages as the Spirit gave them [ability] to speak out.

Acts 4:13

Now [when they] saw the boldness of Peter and John, and understood that they were uneducated and untrained men, they were astonished, and recognized them, that they had been with Jesus.

Acts 6:7

And the word of God kept spreading, and the number of disciples in Jerusalem was increasing greatly, and a large number of priests began obeying the faith.

Acts 26:9-11

Indeed, I myself thought it was necessary to do many [things] opposed to the name of Jesus the Nazarene,

Galatians 1:23

and they were only hearing, "The one formerly persecuting us is now proclaiming the faith that formerly he was attempting to destroy,"

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 those who err [in] spirit will {acquire} understanding, and those who grumble will learn instruction.
Nehemiah 8:8
So they read the book from the law of God, making it clear and giving the meaning so that they could understand the reading.
Matthew 11:25
At that time Jesus answered [and] said, "I praise you, Father, Lord of heaven and earth, because you have hidden these [things] from the wise and intelligent, and have revealed them to young children.
Matthew 16:17
And Jesus answered [and] said to him, "Blessed are you, Simon son of Jonah, because flesh and blood did not reveal [this] to you, but my Father [who is] in heaven.
Acts 6:7
And the word of God kept spreading, and the number of disciples in Jerusalem was increasing greatly, and a large number of priests began obeying the faith.
Acts 26:9
Indeed, I myself thought it was necessary to do many [things] opposed to the name of Jesus the Nazarene,
Galatians 1:23
and they were only hearing, "The one formerly persecuting us is now proclaiming the faith that formerly he was attempting to destroy,"

General references

Mark 7:35
And his ears were opened and {his difficulty in speaking was removed} and he began to speak normally.