Matthew 11:15

The person who has ears to hear with ought to listen [to this] carefully.

Matthew 13:9

The person who has ears to hear with ought to listen [to this] carefully."

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.

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,

Revelation 22:10-11

Then the angel said to me, "Do not seal up the words of the prophecy of this book, for the time is near [i.e., for the events of its prophecies to begin to happen].

Treasury of Scripture Knowledge

Summary

But when I speak with thee, I will open thy mouth, and thou shalt say unto them, Thus saith the Lord GOD; He that heareth, let him hear; and he that forbeareth, let him forbear: for they are a rebellious house.

Bible References

I will

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.
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,

Thus

Matthew 11:15
The person who has ears to hear with ought to listen [to this] carefully.
Matthew 13:9
The person who has ears to hear with ought to listen [to this] carefully."
Revelation 22:10
Then the angel said to me, "Do not seal up the words of the prophecy of this book, for the time is near [i.e., for the events of its prophecies to begin to happen].