Revelation 2:16-17

"Repent therefore! Otherwise, I will soon come to you and will fight against them with the sword of my mouth. He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give some of the hidden manna. I will also give him a white stone with a new name written on it, known only to him who receives it."

Repent
Revelation 2:5 "Remember the height from which you have fallen! Repent and do the things you did at first. If you do not repent, I will come to you and remove your lampstand from its place." (Ephesus)

and will fight against them with the sword of my mouth
2 Thessalonians 2:8 And then the lawless one will be revealed, whom the Lord Jesus will overthrow with the breath of his mouth and destroy by the splendor of his coming.
Revelation 1:16 In his right hand he held seven stars, and out of his mouth came a sharp double-edged sword. His face was like the sun shining in all its brilliance.

He who has an ear, let him hear
Revelation 2:7 "He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will give the right to eat from the tree of life, which is in the paradise of God." (Ephesus)

To him who overcomes
John 16:33 "I have told you these things, so that in me you may have peace. In this world you will have trouble. But take heart! I have overcome the world."

I will give some of the hidden manna
John 6:49-50 "Your forefathers ate the manna in the desert, yet they died. But here is the bread that comes down from heaven, which a man may eat and not die."
Psalm 78:24 ... he rained down manna for the people to eat, he gave them the grain of heaven.

I will also give him a white stone with a new name
Isaiah 56:5 "... to them I will give within my temple and its walls a memorial and a name better than sons and daughters; I will give them an everlasting name that will not be cut off."
Isaiah 62:2 The nations will see your righteousness, and all kings your glory; you will be called by a new name that the mouth of the LORD will bestow.
Isaiah 65:15 "You (who forsake the LORD) will leave your name to my chosen ones as a curse; the Sovereign LORD will put you to death, but to his servants he will give another name."

known only to him who receives it
Revelation 19:12 His eyes are like blazing fire, and on his head are many crowns. He has a name written on him that no one knows but he himself.

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.