Revelation 3:5

3:5 The one who conquers will be dressed like them in white clothing, and I will never erase his name from the book of life, but will declare his name before my Father and before his angels.

Revelation 13:8

13:8 and all those who live on the earth will worship the beast, everyone whose name has not been written since the foundation of the world in the book of life belonging to the Lamb who was killed.

Revelation 21:27

21:27 but nothing ritually unclean will ever enter into it, nor anyone who does what is detestable or practices falsehood, but only those whose names are written in the Lamb’s book of life.

Revelation 22:9

22:9 But he said to me, “Do not do this! I am a fellow servant with you and with your brothers the prophets, and with those who obey the words of this book. Worship God!”