Zephaniah 3:8

3:8 Therefore wait ye upon me, saith the LORD, until the day that I rise up to the prey: for my determination [is] to gather the nations, that I may assemble the kingdoms, to pour upon them mine indignation, [even] all my fierce anger: for all the earth shall be devoured with the fire of my jealousy.

Zechariah 14:2-4

14:2 For I will gather all nations against Jerusalem to battle; and the city shall be taken, and the houses rifled, and the women ravished; and half of the city shall go forth into captivity, and the residue of the people shall not be cut off from the city. 14:3 Then shall the LORD go forth, and fight against those nations, as when he fought in the day of battle. 14:4 And his feet shall stand in that day upon the mount of Olives, which [is] before Jerusalem on the east, and the mount of Olives shall cleave in the midst thereof toward the east and toward the west, [and there shall be] a very great valley; and half of the mountain shall remove toward the north, and half of it toward the south.

Revelation 16:14

16:14 For they are the spirits of devils, working miracles, [which] go forth unto the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.

Revelation 16:16

16:16 And he gathered them together into a place called in the Hebrew tongue Armageddon.

Revelation 19:19-21

19:19 And I saw the beast, and the kings of the earth, and their armies, gathered together to make war against him that sat on the horse, and against his army. 19:20 And the beast was taken, and with him the false prophet that wrought miracles before him, with which he deceived them that had received the mark of the beast, and them that worshipped his image. These both were cast alive into a lake of fire burning with brimstone. 19:21 And the remnant were slain with the sword of him that sat upon the horse, which [sword] proceeded out of his mouth: and all the fowls were filled with their flesh.

Revelation 20:8

20:8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom [is] as the sand of the sea.