Luke 21:15

for I will give to you mouth and wisdom, which all who are opposed to you will not be able to gainsay nor resist.

Acts 6:10

and they were not able to resist the wisdom and spirit with which he was speaking.

Luke 12:12

for the Holy Spirit will teach you in that hour the things which it behooveth you to speak.

Luke 24:45

Then He opened their mind, that they might understand the Scriptures.

Acts 2:4

and they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.

Acts 4:8-13

Then Peter being full of the Holy Spirit said to them, Ye rulers of the people and elders,

Acts 4:31-33

And they praying, the place in which they were assembled was shaken, and they were all filled with the Holy Ghost, and continued to speak the word of God with boldness.

Acts 24:25

And he reasoning concerning righteousness and temperance and the coming judgment, Felix, being alarmed, responded, Go thy way for this time; and having received an opportunity, I will call for thee:

Acts 26:28

And Agrippa said to Paul, With little persuasion thou dost persuade thyself to make me a Christian.

Ephesians 6:19

and for me that the word may be given unto me in opening of my mouth, boldly to make known the mystery of the gospel,

Colossians 4:3-4

at the same time also praying for us, in order that God may open to us the door of the word, to speak the mystery of Christ, on account of which I indeed am bound;

2 Timothy 4:16-17

In my first defence no one stood by me, but all left me: may it not be charged against them:

James 1:5

But if any of you lack wisdom, let him ask God, who gives to all cheerfully and upbraids none; and it will be given unto 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
and they were not able to resist the wisdom and spirit with which he was speaking.
Acts 24:25
And he reasoning concerning righteousness and temperance and the coming judgment, Felix, being alarmed, responded, Go thy way for this time; and having received an opportunity, I will call for thee:
Acts 26:28
And Agrippa said to Paul, With little persuasion thou dost persuade thyself to make me a Christian.
2 Timothy 4:16
In my first defence no one stood by me, but all left me: may it not be charged against them:

General references

Luke 12:12
for the Holy Spirit will teach you in that hour the things which it behooveth you to speak.
Luke 14:6
and they were not able to respond to these things.
1 Corinthians 1:27
but God has chosen the foolish things of the world, that he may confound the wise; and God has chosen the weak things of the world, that he may confound the strong;