Revelation 3:5 NIV

Matthew 10:32 NIV
“Whoever acknowledges me before others, I will also acknowledge before my Father in heaven.

Revelation 17:8 NIV
The beast, which you saw, once was, now is not, and yet will come up out of the Abyss and go to its destruction. The inhabitants of the earth whose names have not been written in the book of life from the creation of the world will be astonished when they see the beast, because it once was, now is not, and yet will come.

Revelation 20:12 NIV
And I saw the dead, great and small, standing before the throne, and books were opened. Another book was opened, which is the book of life. The dead were judged according to what they had done as recorded in the books.

Revelation 20:15 NIV
Anyone whose name was not found written in the book of life was thrown into the lake of fire.

Revelation 21:27 NIV
Nothing impure will ever enter it, nor will anyone who does what is shameful or deceitful, but only those whose names are written in the Lamb’s book of life.