Isaiah 13:2
Lift ye up a banner upon the high mountain, exalt the voice unto them, shake the hand, that they may go into the gates of the nobles.
Cross-reference
Isaiah 5:26 uses the identical 'lift a banner' imagery for summoning distant nations, reinforcing the same prophetic action.
In Isaiah 11:12, the same 'raise a signal' phrase gathers Israel, while here it summons nations against Babylon. Same image, different purpose.
Isaiah 21:2 also calls to attack Babylon ('Go up, O Elam'), directly paralleling the summons in Isaiah 13:2 against the same city.
Isaiah 18:3 also depicts a signal raised on mountains for universal attention, but that oracle concerns Cush, not Babylon.
Jeremiah 50:2 uses the same banner-raising language to announce Babylon's fall, directly echoing Isaiah's call to action.
Jeremiah 51:27 commands to 'set up a standard' and prepare nations for war against Babylon, mirroring the signal in Isaiah 13:2.
Jeremiah 50:9 describes God stirring nations against Babylon, directly continuing the judgment theme and summons from Isaiah 13:2.
Jeremiah 50:41 also describes a people from the north stirred against Babylon, reinforcing the same gathering for judgment.
Jeremiah 51:12 commands setting up a banner on Babylon's walls, directly echoing the banner-raising imagery for battle.
Zechariah 2:9 describes God shaking His hand over nations, a signal of judgment akin to raising a banner.
Jeremiah 49:28 commands 'Rise up, go up against Kedar'—another summons for battle, sharing the same pattern as Isaiah 13:2.