'Book of Life' in the Bible

He who overcomes [the world through believing that Jesus is the Son of God] will accordingly be dressed in white clothing; and I will never blot out his name from the Book of Life, and I will confess and openly acknowledge his name before My Father and before His angels [saying that he is one of Mine].

All the inhabitants of the earth will fall down and worship him, everyone whose name has not been written since the foundation of the world in the Book of Life of the Lamb who has been slain [as a willing sacrifice].

“The beast that you saw was [once], but [now] is not, and he is about to come up out of the abyss (the bottomless pit, the dwelling place of demons) and go to destruction (perdition). And the inhabitants of the earth, whose names have not been written in the Book of Life from the foundation of the world, will be astonished when they see the beast, because he was and is not and is yet to come [to earth].

And if anyone’s name was not found written in the Book of Life, he was hurled into the lake of fire.

and nothing that defiles or profanes or is unwashed will ever enter it, nor anyone who practices abominations [detestable, morally repugnant things] and lying, but only those [will be admitted] whose names have been written in the Lamb’s Book of Life.