Luke 21:15

for I will give you utterance and wisdom which none of your opponents will be able to withstand or reply to.

Ephesians 6:19

and ask on my behalf that words may be given to me so that, outspoken and fearless, I may make known the truths (hitherto kept secret)

Treasury of Scripture Knowledge

Summary

In that day shall thy mouth be opened to him which is escaped, and thou shalt speak, and be no more dumb: and thou shalt be a sign unto them; and they shall know that I am the LORD.

Bible References

Thy

Luke 21:15
for I will give you utterance and wisdom which none of your opponents will be able to withstand or reply to.
Ephesians 6:19
and ask on my behalf that words may be given to me so that, outspoken and fearless, I may make known the truths (hitherto kept secret)