Acts 6:10

But they could not stand up to the wisdom and [power of] the Holy Spirit by which Stephen spoke.

Luke 21:15

for I will give you a mouth [i.e., the ability to speak properly] and wisdom [i.e., the knowledge of what to say], which none of your opponents will be able to resist or speak against.

Matthew 10:19-20

But when they turn you over [to them], do not worry about how to speak or what you should say. For you will be told [i.e., by God] what to say at the right time.

Luke 1:17

He will go on ahead of the Messiah [See verse 76], in the spirit and power of Elijah, to rekindle the affections of fathers for their children, and [to influence] disobedient people to live wisely like righteous people. And he will prepare the people to be ready for [the coming of] the Lord."

Luke 12:11-12

And when people bring you in front of synagogue assemblies and rulers and authorities [i.e., for judgment], do not worry about how to speak or what you should say.

John 7:46

The guards answered, "No one has ever spoken like this man."

Acts 5:39

but if [it happens to be] of God, you will not be able to defeat them. And [if you try to], you may [actually] be fighting against [the work of] God."

Acts 7:51

You people are unbending and unrepentant in your hearts and [unwilling to listen with] your ears. You are always resisting [the desires of] the Holy Spirit just like your forefathers did.

1 Corinthians 2:4

And I did not use persuasive words of [human] wisdom in my message and preaching, but they were [accompanied by] a demonstration of the Holy Spirit and power [from God]. [Note: This "demonstration" could have included the evidence of miraculous spiritual gifts which Paul utilized while there in Corinth. See 14:18].

Treasury of Scripture Knowledge

Summary

And they were not able to resist the wisdom and the spirit by which he spake.

Bible References

Able

Acts 5:39
but if [it happens to be] of God, you will not be able to defeat them. And [if you try to], you may [actually] be fighting against [the work of] God."
Acts 7:51
You people are unbending and unrepentant in your hearts and [unwilling to listen with] your ears. You are always resisting [the desires of] the Holy Spirit just like your forefathers did.
Matthew 10:19
But when they turn you over [to them], do not worry about how to speak or what you should say. For you will be told [i.e., by God] what to say at the right time.
Luke 12:11
And when people bring you in front of synagogue assemblies and rulers and authorities [i.e., for judgment], do not worry about how to speak or what you should say.
Luke 21:15
for I will give you a mouth [i.e., the ability to speak properly] and wisdom [i.e., the knowledge of what to say], which none of your opponents will be able to resist or speak against.
John 7:46
The guards answered, "No one has ever spoken like this man."

General references

Luke 12:12
For the Holy Spirit will teach you what you should say at that very time."
Luke 14:6
And they were not able to give an answer to these things.
1 Corinthians 1:27
But God chose what the world considers foolish [i.e., people with little apparent ability], in order to shame the "wise people." And He chose what the world considers weak in order to shame what it considers strong.