Luke 21:15

for I will give you a mouth and wisdom which all your enemies shall not be able to resist or dispute.

Acts 6:10

and were not able to resist the wisdom and spirit with which he spoke.

Treasury of Scripture Knowledge

Summary

And it came to pass, when David had made an end of speaking these words unto Saul, that Saul said, Is this thy voice, my son David? And Saul lifted up his voice, and wept.

Bible References

Is this

Luke 21:15
for I will give you a mouth and wisdom which all your enemies shall not be able to resist or dispute.
Acts 6:10
and were not able to resist the wisdom and spirit with which he spoke.