'Tree of Life' in the Bible

The one who has an ear, let him hear what the Spirit says to the churches. To the one who conquers, I will grant to him to eat from the tree of life which is in the paradise of God.'

in the middle of its street, and {on both sides of the river} [is] the tree of life, producing twelve fruits--yielding its fruit according to every month--and the leaves of the tree [are] for the healing of the nations.

Blessed [are] the ones who wash their robes, so that their authority will be over the tree of life and they may enter into the city through the gates.

And if anyone takes away from the words of this book of prophecy, God will take away his share of the tree of life and from the holy city that are written in this book.