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 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.