Revelation 16:12
And the sixth angel poured out his vial upon the great river Euphrates; and the water thereof was dried up, that the way of the kings of the east might be prepared.
Cross-reference
Revelation 9:14 also mentions the Euphrates in the sixth trumpet — binding angels there, while the sixth bowl dries it for kings.
Isaiah 11:15 prophesies God drying the Euphrates for His people's return — here the drying opens a path for invading kings, reversing that deliverance.
Isaiah 44:27 shows God drying up rivers and deeps, directly paralleling the drying of the Euphrates in Revelation.
Jeremiah 50:38-40 judges Babylon by drying its waters, echoing the same divine action against the Euphrates.
Jeremiah 51:36 declares God will dry up Babylon's sea, a parallel to the Euphrates being dried in judgment.
Joshua 4:12 records crossing the Jordan after God dried it, a typological pattern of God preparing a way for battle.
Isaiah 43:16 recalls God making a path through the sea — the Exodus pattern repeated here as a dry way for kings.
Ezekiel 30:12 has God drying the Nile as judgment on Egypt — directly parallel to drying the Euphrates in judgment here.
Zechariah 10:11 prophesies drying the Nile and passing through seas — a strong parallel to drying the Euphrates to make a way.
Isaiah 8:7 uses the Euphrates as a flood of Assyrian judgment — here drying the river prepares for a different eastern invasion.
Isaiah 41:2 portrays God raising Cyrus from the east, prefiguring the kings from the east in Revelation.
Isaiah 41:25 mentions one from the north and east, linking to the kings from the east in Revelation.