Acts 6:10

but were unable to withstand the wisdom and spirit with which he used to speak.

Luke 21:15

"for I will give you utterance and a wisdom which none of your adversaries will be able to answer or withstand.

Matthew 10:19-20

"But whenever they apprehend you, do not be anxious about how you shall speak or what you shall say; for it will be given you in that very hour what to say.

Luke 1:17

"He shall go before Him in the wisdom and power of Elijah to turn the hearts of the fathers to their children and the disobedient to the wisdom of the righteous, and so to make ready for the Lord a people prepared for him."

Luke 12:11-12

"And when they are bringing you before the synagogues and the rulers and authorities, do not worry about how or what you shall answer; or what you shall say;

John 7:46

The officers answered, "Never yet did a man speak like this man."

Acts 5:39

"but if it is from God, you cannot put it down; you may even find yourselves fighting against God."

Acts 7:51

"Stiff-necked, uncircumcised in heart and ears! You are always resisting the Holy Ghost! As your fathers did, so do you.

1 Corinthians 2:4

My message and my preaching were not in the persuasive language of philosophy, but in demonstration of the Spirit and of power;

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 is from God, you cannot put it down; you may even find yourselves fighting against God."
Acts 7:51
"Stiff-necked, uncircumcised in heart and ears! You are always resisting the Holy Ghost! As your fathers did, so do you.
Matthew 10:19
"But whenever they apprehend you, do not be anxious about how you shall speak or what you shall say; for it will be given you in that very hour what to say.
Luke 12:11
"And when they are bringing you before the synagogues and the rulers and authorities, do not worry about how or what you shall answer; or what you shall say;
Luke 21:15
"for I will give you utterance and a wisdom which none of your adversaries will be able to answer or withstand.
John 7:46
The officers answered, "Never yet did a man speak like this man."

General references

Luke 12:12
"for the Holy Spirit will teach you in that hour what you ought to say."
Luke 14:6
They could not answer this.
1 Corinthians 1:27
No, God has chosen the world's folly to confound its philosophy; and the world's weakness to confound its strength.