Matthew 10:19-20

But when they deliver you up, do not worry about how you are to speak or what you are to say; for what you are to say will be given to you in that hour;

Luke 12:11-12

Now when they bring you before the synagogues and rulers and authorities, do not worry about how or what you should answer, or what you are to say;

Luke 21:14-15

Therefore settle it in your minds not to meditate beforehand how you will answer;

2 Corinthians 8:16

But thanks be to God who puts the same earnest care for you into the heart of Titus.

Philippians 2:13

for it is God who is at work in you, both to will and to work for his good pleasure.

James 1:16-18

Do not be deceived, my beloved brethren.

Treasury of Scripture Knowledge

Summary

The preparations of the heart in man, and the answer of the tongue, is from the LORD.

Bible References

Preparations

2 Corinthians 8:16
But thanks be to God who puts the same earnest care for you into the heart of Titus.
Philippians 2:13
for it is God who is at work in you, both to will and to work for his good pleasure.
James 1:16
Do not be deceived, my beloved brethren.

And

Matthew 10:19
But when they deliver you up, do not worry about how you are to speak or what you are to say; for what you are to say will be given to you in that hour;
Luke 12:11
Now when they bring you before the synagogues and rulers and authorities, do not worry about how or what you should answer, or what you are to say;
Luke 21:14
Therefore settle it in your minds not to meditate beforehand how you will answer;