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.

Acts 6:10

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

Luke 12:12

For the Holy Spirit will teach you what you should say at that very time."

Luke 24:45

Then He opened their minds [miraculously ?] so they would understand the Scriptures.

And they [i.e., the apostles] were all filled with [the power of] the Holy Spirit and began to speak ["the mighty accomplishments of God," See verse 11] in different languages, as the Holy Spirit gave them the ability.

Acts 4:8-13

Then Peter, filled with the Holy Spirit, addressed them, saying, "Rulers and elders of the people,

Acts 4:31-33

And after they had prayed, the place where they were gathered shook, and these disciples were all filled with [the power of] the Holy Spirit and they were able to speak the message of God with boldness.

Acts 24:25

And as he discussed the matters of doing right, and [maintaining] self control and the coming judgment, Felix became terrified and answered, "Go on away for now; I will call you back when it is convenient for me."

Acts 26:28

Agrippa said to Paul, "You expect to persuade me to be a Christian with such little effort [or, in such a short time]?"

Ephesians 6:19

And [also pray] for me to be given boldness of speech in opening my mouth to make known the secret plan of the Gospel,

Colossians 4:3-4

At the same time, pray for us also, that God will open up a door [of opportunity] for [proclaiming] the message, so we can tell about the [previously] hidden secret of Christ, for which I have also been imprisoned.

2 Timothy 4:16-17

At my first defense [Note: Paul here refers to his initial hearing before the Roman court] no one supported me, but everyone deserted me. May it not be held against them.

James 1:5

But if any one of you lacks wisdom, he should pray to God, who gives to everyone generously and does not begrudge [the person who asks], and it will be given to him.

Treasury of Scripture Knowledge

Summary

Luke 21:15

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

Which

General references

Bible References

Which

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

Agrippa said to Paul, "You expect to persuade me to be a Christian with such little effort [or, in such a short time]?"

At my first defense [Note: Paul here refers to his initial hearing before the Roman court] no one supported me, but everyone deserted me. May it not be held against them.

General references

For the Holy Spirit will teach you what you should say at that very time."

And they were not able to give an answer to these things.

As Paul was being brought into the headquarters building, he said to the commander, "Can I speak with you?" The commander replied [with surprise], "You know the Greek language?

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.