Bible reference for behold i make all things new

The Bible reference for "Behold, I make all things new" is Revelation 21:5, which says:

"And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful." (KJV)

This verse is part of John's vision of the new heaven and the new earth in the book of Revelation, and it is a promise of God's ultimate redemption and restoration of all things.