Revelation 3:6 uses the exact same refrain — 'He who has an ear, let him hear what the Spirit says' — repeated throughout the letters.

Revelation 3:13 repeats the same refrain, calling for attentive hearing of the Spirit's message.

Revelation 2:7 also includes the refrain 'He who has an ear, let him hear what the Spirit says to the churches'.

Revelation 2:11 contains the same refrain, linking each letter's call to heed the Spirit.

Revelation 2:17 echoes the identical refrain, emphasizing the repeated exhortation to hear the Spirit.

Revelation 1:19 commands John to write what he sees, including the letters to the churches where this refrain appears — a direct contextual link.

Revelation 4:1 picks up immediately after the letters, with a voice inviting John to see the future — the Spirit's message now expands beyond the churches.

Revelation 22:16 states Jesus sent this testimony for the churches — directly tying back to the letters where this call to hear is given.

In Matthew 11:15, Jesus uses the identical call to hear, emphasizing the importance of listening to His words.

In Matthew 13:9, Jesus uses the same phrase after the parable of the sower, urging spiritual perception.

In Mark 4:9, Jesus uses the same call to hear after the parable of the sower, parallel to Revelation's refrain.

In Mark 7:16, Jesus says 'if anyone has ears to hear, let him hear' — a variant of the same exhortation.