They shall surely gather together; it is true, there will not want some that shall combine and make an attempt against thee. But not by me; as they do this without any such commission from me, as Sennacherib and Nebuchadnezzar had, Isaiah 10:6,7 Jer 25:9; so they shall not have my help in it, without which all their endeavours will be vain and unsuccessful. Whosoever shall gather together to battle, as is manifest from the following words, of which kind of gathering this word is used, Psalms 140:2, and elsewhere. Against thee, Heb. with thee. But to fight with a man is all one with fighting against him. Shall fall for thy sake; for that respect and love which I bear to thee. Or before thee, as this particle is sometimes used, so as thine eyes shall behold it.
Related Commentaries of Isaiah 54:15
Isaiah 54:15
15 Behold, they shall surely gather together, but not by me: whosoever shall gather together against thee shall fall for thy sake.