וְקָרָ֨אתִי עָלָ֤יו לְכָל־הָרַי֙ חֶ֔רֶב נְאֻ֖ם אֲדֹנָ֣י יְהוִ֑ה חֶ֥רֶב אִ֖ישׁ בְּאָחִ֥יו תִּֽהְיֶֽה׃
און איך װעל רופֿן קעגן אים אױף אַלע מײַנע בערג אַ שװערד, זאָגט גאָט דער האַר;אײנעמס שװערד װעט זײַן קעגן אַנדערן.
Rashi
And I will call the sword against him upon all My mountains for the sword to come upon them, against him. “And I will call” means, I will prepare. And what is the sword that I will call against him? Their own sword: “every man’s sword shall be against his brother.”