Revelation 3:3

3:3 Therefore, remember what you received and heard, and obey it, and repent. If you do not wake up, I will come like a thief, and you will never know at what hour I will come against you.

Revelation 3:20

3:20 Listen! I am standing at the door and knocking! If anyone hears my voice and opens the door I will come into his home and share a meal with him, and he with me.

Revelation 14:9

14:9 A third angel followed the first two, declaring in a loud voice: “If anyone worships the beast and his image, and takes the mark on his forehead or his hand,

Revelation 22:18-19

22:18 I testify to the one who hears the words of the prophecy contained in this book: If anyone adds to them, God will add to him the plagues described in this book. 22:19 And if anyone takes away from the words of this book of prophecy, God will take away his share in the tree of life and in the holy city that are described in this book.