Isaiah 54:15
"Behold, they shall surely gather together, but not by me: whosoever shall gather together against thee shall fall for thy sake."
Cross References (ranked by relevance)
And it shall come to pass in that day, that I will seek to destroy all the nations that come against Jerusalem.
For thus saith the LORD of hosts; After the glory hath he sent me unto the nations which spoiled you: for he that toucheth you toucheth the apple of his eye.
Thus saith the LORD, your redeemer, the Holy One of Israel; For your sake I have sent to Babylon, and have brought down all their nobles, and the Chaldeans, whose cry is in the ships.
And in that day will I make Jerusalem a burdensome stone for all people: all that burden themselves with it shall be cut in pieces, though all the people of the earth be gathered together against it.
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.