Revelation 17:3 first describes the beast with seven heads that the woman sits on, which this verse interprets.

Revelation 17:7 announces the angel's explanation of the beast's seven heads, which v9 then provides.

Revelation 17:18 identifies the woman as the great city, complementing this verse's interpretation of the seven heads.

Revelation 13:1 also describes a beast with seven heads, the same symbol interpreted here as mountains.

Revelation 13:18 also begins 'Here is wisdom' and calls for understanding of the beast's number, mirroring the call for wisdom to interpret the seven heads in Rev 17:9.

Revelation 12:3 depicts a red dragon with seven heads, the same symbolic number later interpreted in this verse.

Hosea 14:9 asks 'Who is wise? He shall understand these things' — directly parallel to Rev 17:9's 'here is the mind which has wisdom.' Both require wisdom to understand God's ways.

Matthew 24:15 uses the same 'let the reader understand' formula, urging discernment about prophetic symbols.

Daniel 12:8-10 says the wise will understand but the wicked will not, echoing Rev 17:9's call for wisdom to grasp the meaning of the seven heads.

Matthew 13:11 similarly calls for divine insight to understand mysteries — here, the meaning of the seven heads.