Luke 21:15

"For I will give you a mouth and wisdom, which all your adversaries shall not be able to gainsay nor resist."

Cross References (ranked by relevance)

Then the LORD put forth his hand, and touched my mouth. And the LORD said unto me, Behold, I have put my words in thy mouth.

Ephesians 6:19 27

And for me, that utterance may be given unto me, that I may open my mouth boldly, to make known the mystery of the gospel,

Luke 12:12 25

For the Holy Ghost shall teach you in the same hour what ye ought to say.

Acts 6:10 21

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

Luke 24:45 13

Then opened he their understanding, that they might understand the scriptures,

Proverbs 2:6 12

For the LORD giveth wisdom: out of his mouth cometh knowledge and understanding.

James 1:5 12

If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him.

Acts 26:28

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

Acts 24:25

And as he reasoned of righteousness, temperance, and judgment to come, Felix trembled, and answered, Go thy way for this time; when I have a convenient season, I will call for thee.

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.