Revelation 22:2, 14, 19

In the middle of its street, and on either side of the river, was the tree of life, which bore twelve fruits, each tree yielding its fruit every month. The leaves of the tree were for the healing of the nations.

Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city.

and if anyone takes away from the words of the book of this prophecy, God shall take away his part from the Book of Life, from the holy city, and from the things which are written in this book.