King James Version (KJV)
And I will fill his mountains with his slain {men}: in thy hills, and in thy valleys, and in all thy rivers, shall they fall that are slain with the sword.
Modern English
I will fill its mountains with its slain. The slain with the sword will fall in your hills and in your valleys and in all your watercourses.
Hebrew
וּמִלֵּאתִ֥י אֶת־הָרָ֖יו חֲלָלָ֑יו גִּבְעוֹתֶ֤יךָ וְגֵאוֹתֶ֙יךָ֙ וְכָל־אֲפִיקֶ֔יךָ חַלְלֵי־חֶ֖רֶב יִפְּל֥וּ בָהֶֽם׃
vmileʾtiy ʾet-harayv ḥalalayv gibʿvoteyka vgeʾvoteyka vkal-ʾapiyqeyka ḥalley-ḥereb yiplv bahem