Revelation 2:23

2:23 Furthermore, I will strike her followers with a deadly disease, and then all the churches will know that I am the one who searches minds and hearts. I will repay each one of you what your deeds deserve.

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.