Acts 6:10

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

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.

Matthew 10:19-20

And when they may deliver you, be not solicitous how or what you may speak: for it will be given unto you in that hour what you may say.

Luke 1:17

And he will go before Him in the spirit and Power of Elijah, to turn the hearts of the fathers to the children, and the disobedient unto the understanding of the righteous, to prepare a people made ready for the Lord.

Luke 12:11-12

But when they may carry you into the synagogues, and tribunals, and authorities; do not be solicitous as to what you may apologize, or what you may say:

John 7:46

The officers responded, Never did a man so speak, as this man speaks.

Acts 5:39

but if it be of God, you will not be able to destroy them, lest perchance you may also be found fighting against God.

Acts 7:51

Ye stiffnecked and uncircumcised in heart and ears, you do always resist the Holy Ghost; as your fathers did, so do ye.

1 Corinthians 2:4

And my speech and my preaching were not in the persuasive words of wisdom, but in the demonstration of the Spirit and the 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 be of God, you will not be able to destroy them, lest perchance you may also be found fighting against God.
Acts 7:51
Ye stiffnecked and uncircumcised in heart and ears, you do always resist the Holy Ghost; as your fathers did, so do ye.
Matthew 10:19
And when they may deliver you, be not solicitous how or what you may speak: for it will be given unto you in that hour what you may say.
Luke 12:11
But when they may carry you into the synagogues, and tribunals, and authorities; do not be solicitous as to what you may apologize, or what you may say:
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.
John 7:46
The officers responded, Never did a man so speak, as this man speaks.

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;