Luke 21:15

for I will give you a mouth and wisdom which none of your adversaries will be able to resist or contradict.

Ephesians 6:19

and also pray for me, that in the opening of my mouth, utterance may be given me so that I will fearlessly make known the mystery of the gospel,

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 a mouth and wisdom which none of your adversaries will be able to resist or contradict.
Ephesians 6:19
and also pray for me, that in the opening of my mouth, utterance may be given me so that I will fearlessly make known the mystery of the gospel,