Revelation 2:9
2:9 ‘I know the distress you are suffering and your poverty (but you are rich). I also know the slander against you by those who call themselves Jews and really are not, but are a synagogue of Satan.
Revelation 12:9
12:9 So that huge dragon – the ancient serpent, the one called the devil and Satan, who deceives the whole world – was thrown down to the earth, and his angels along with him.
Revelation 2:24
2:24 But to the rest of you in Thyatira, all who do not hold to this teaching (who have not learned the so-called “deep secrets of Satan”), to you I say: I do not put any additional burden on you.
Revelation 3:9
3:9 Listen! I am going to make those people from the synagogue of Satan – who say they are Jews yet are not, but are lying – Look, I will make them come and bow down at your feet and acknowledge that I have loved you.