Luke 21:15

I will give you ability to talk and words of wisdom, which your adversaries shall not be able to resist or refute.

Jeremiah 1:9

Then Jehovah stretched out his hand and touched my mouth. Jehovah said to me: I have put my words in your mouth.

Acts 6:10

They were not able to resist the wisdom and the spirit by which he spoke.

Exodus 4:11-12

Jehovah said to him: Who has made man's mouth? Or who makes him mute or deaf, or seeing or blind? Is it not I, Jehovah?

Proverbs 2:6

Jehovah gives wisdom. From his mouth come knowledge and understanding.

Luke 12:12

Holy Spirit will teach you in that very hour what you should say.

Luke 24:45

He opened their minds that they might understand the scriptures.

Acts 2:4

They were all filled with the Holy Spirit. They began to speak with different tongues, as the Spirit moved them to speak.

Acts 4:8-13

Then Peter, filled with the Holy Spirit, said: You rulers of the people, and elders of Israel,

Acts 4:31-33

When they prayed, the place where they assembled together was shaken. They were all filled with the Holy Spirit, and they spoke the word of God with boldness.

Acts 24:25

He reasoned about righteousness, temperance, and judgment to come. Felix trembled, and answered: Go your way for now. When I have time I will send for you.

Acts 26:28

Then Agrippa said to Paul: In a short time you would persuade (convince) me to become a Christian.

Ephesians 6:19

Pray on my behalf, that ability to speak may be given to me, to make known with boldness the secret of the good news.

Colossians 4:3-4

Pray also for us that God may open to us a door for the word, to speak the secret of Christ, for which I have also been imprisoned.

2 Timothy 4:16-17

At first no one defended me. They all abandoned me. May it not be counted against them.

James 1:5

If any of you lacks wisdom let him ask of God. He gives to all generously and without reproach and it will be given to him.

Treasury of Scripture Knowledge

Summary

For I will give you a mouth and wisdom, which all your adversaries shall not be able to gainsay nor resist.

Bible References

Which

Acts 6:10
They were not able to resist the wisdom and the spirit by which he spoke.
Acts 24:25
He reasoned about righteousness, temperance, and judgment to come. Felix trembled, and answered: Go your way for now. When I have time I will send for you.
Acts 26:28
Then Agrippa said to Paul: In a short time you would persuade (convince) me to become a Christian.
2 Timothy 4:16
At first no one defended me. They all abandoned me. May it not be counted against them.

General references

Exodus 4:12
Now then go, and I, even I, will be with your mouth. I will teach you what you are to say.
Luke 12:12
Holy Spirit will teach you in that very hour what you should say.
Luke 14:6
Again they could not answer.
Acts 21:37
And as Paul was about to be brought into the barracks, he said to the commander, Might I say something to you? He replied: Do you know Greek?
1 Corinthians 1:27
Instead God chose the foolish things of the world to confuse (shame) the wise. God chose the weak things of the world to confuse (shame) the things that are mighty.