מֵ֤י מָצוֹר֙ שַֽׁאֲבִי־לָ֔ךְ חַזְּקִ֖י מִבְצָרָ֑יִךְ בֹּ֧אִי בַטִּ֛יט וְרִמְסִ֥י בַחֹ֖מֶר הַחֲזִ֥יקִי מַלְבֵּֽן׃
Draw thee water for the siege, Strengthen thy fortresses; Go into the clay, and tread the mortar, Lay hold of the brickmould.
Rashi on Nahum
Draw siege water for yourself—When a city is about to be besieged, the people of the city gather much water into its midst in barrels, [so that they will have water] to drink during the days of the siege, when there are no cisterns within it [the city].
Rashi on Nahum
come into the clay and tread—it, to make bricks therefrom, in order to strengthen the cracks in the wall.
Rashi on Nahum
grasp the brickmold—Hold the brickmold, which is made for a mold of the bricks in your hand, to make bricks in it.