יואל ד:טז פירוש: רש״י

shall roar from Zion—Because of what they did to Zion.

and the heavens and earth shall quake—He will deal retribution upon the heavenly princes and then upon the nations.

a shelter Heb. מַחֲסֶה, an expression of a cover, abrier in O.F., abri in modern French, a shelter.