Revelation 1:20 in the King James Version
The mystery of the seven stars which thou sawest in my right hand, and the seven golden candlesticks. The seven stars are the angels of the seven churches: and the seven candlesticks which thou sawest are the seven churches.
Context
19 Write therefore the things which you have seen, and the things which are, and the things which will happen hereafter.
20 The mystery of the seven stars which you saw in my right hand, and the seven golden lamp stands is this: The seven stars are the angels of the seven assemblies. The seven lamp stands are seven assemblies.