Revelation 1:20
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.
Cross-reference
Revelation 1:16 shows the seven stars in Christ's right hand — exactly the stars that 1:20 interprets as angels of the churches.
Revelation 1:13 describes the Son of Man standing among the seven lampstands — the same lampstands that 1:20 identifies as the churches.
Revelation 1:12 mentions seven golden lampstands — the same lampstands that 1:20 explains are the seven churches.
Revelation 1:4 addresses the seven churches in Asia—the same churches that the lampstands represent in Rev 1:20.
Revelation 3:14 likewise addresses the 'angel' (star) of Laodicea, applying the star symbolism.
Revelation 3:7 is one of the seven letters addressed to the 'angel' (star) of the church, making the star symbolism from 1:20 concrete.
Revelation 3:1 to Sardis says Christ 'holds the seven stars' — directly reusing the symbol that 1:20 identifies as the angels.
Revelation 2:1 applies the symbols: Christ holds the seven stars and walks among the lampstands — directly echoing the meaning from 1:20.
Revelation 11:4 refers to 'two lampstands' representing the witnesses, echoing 1:20's use of lampstands as churches — same symbol in different contexts.
Revelation 9:1 features a star that falls and receives a key, likely representing an angel — paralleling the symbolic use of stars as angels in 1:20.
Zechariah 4:2 shows a golden lampstand with seven lamps — the imagery directly reused in Rev 1:20 for the seven churches.
Luke 8:16 says a lamp is put on a stand to give light—the lampstands in Rev 1:20 are churches meant to shine openly.
Exodus 25:31 describes the golden lampstand (menorah) — the OT prototype for the seven lampstands in Rev 1:20.
Matthew 5:14 calls believers the light of the world—lampstands in Rev 1:20 represent churches, which are to shine that light.
2 Chronicles 4:7 records making ten gold lampstands for the temple — the OT pattern of multiple lampstands that anticipate the seven in Revelation.
1 Kings 7:49 describes ten gold lampstands with seven lamps each — a OT precursor to the seven lampstands representing churches.
Numbers 8:2 commands the seven lamps to shine forward — the OT instruction that prefigures churches as lampstands giving light.
Exodus 37:23 details the making of the seven lamps on the lampstand — the physical prototype of the seven lampstands in Revelation.
Exodus 25:37 describes the seven lamps on the one menorah — the OT prototype for the seven lampstands representing churches in Revelation.
Leviticus 24:4 instructs tending the lamps on the lampstand continuously — the OT pattern of keeping light before God, echoed in the churches as lampstands.
Malachi 2:7 describes priests as messengers (mal'ak) — the same role as the 'angels' (messengers) of the churches in Rev 1:20.