Luke 21:15

which all your adversaries shall not be able to gainsay or resist.

Acts 6:10

And they were not able to withstand the wisdom and the Spirit by which he spake.

Luke 12:12

take no thought how or what ye shall answer or what ye shall say. For the Holy Ghost shall teach you in that hour, what ye ought to say.

Luke 24:45

Then opened he their understanding,

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 filled with the Holy Ghost, said to them, Ye rulers of the people, and elders of Israel,

Acts 4:31-33

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

Acts 24:25

And as he reasoned concerning justice, temperance, and the judgment to come, Felix being terrified, answered, Go thy way for this time; when I have a convenient season, I will call for thee.

Acts 26:28

Then Agrippa said unto Paul, Almost thou persuadest me to be a Christian.

Ephesians 6:19

And for me that utterance may be given me, by the opening my mouth to make known boldly the mystery of the gospel,

Colossians 4:3-4

Withal, praying likewise for us, that God would open to us a door of utterance, to speak the mystery of Christ: for which I am also in bonds:

2 Timothy 4:16-17

At my first defence no man was with me, but all forsook me: may it not be laid to their charge?

James 1:5

If any of you want wisdom, let him ask of God, who giveth to all men liberally and upbraideth not, and it shall be given 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 withstand the wisdom and the Spirit by which he spake.
Acts 24:25
And as he reasoned concerning justice, temperance, and the judgment to come, Felix being terrified, answered, Go thy way for this time; when I have a convenient season, I will call for thee.
Acts 26:28
Then Agrippa said unto Paul, Almost thou persuadest me to be a Christian.
2 Timothy 4:16
At my first defence no man was with me, but all forsook me: may it not be laid to their charge?

General references

Luke 12:12
take no thought how or what ye shall answer or what ye shall say. For the Holy Ghost shall teach you in that hour, what ye ought to say.
Luke 14:6
And they could not answer him again to these things.
Acts 21:37
And as Paul was about to be brought into the castle, he said to the chief captain, May I speak to thee?
1 Corinthians 1:27
But God hath chosen the foolish things of the world, to shame the wise, and the weak things of the world, to shame the things that are mighty: