מִשִּׁפְעַ֥ת סוּסָ֖יו יְכַסֵּ֣ךְ אֲבָקָ֑ם מִקּוֹל֩ פָּרַ֨שׁ וְגַלְגַּ֜ל וָרֶ֗כֶב תִּרְעַ֙שְׁנָה֙ חֽוֹמוֹתַ֔יִךְ בְּבֹאוֹ֙ בִּשְׁעָרַ֔יִךְ כִּמְבוֹאֵ֖י עִ֥יר מְבֻקָּעָֽה׃
Dahil sa dami ng kaniyang mga kabayo, tatakpan ka ng kanilang alikabok; sa ingay ng mga mangangabayo, ng mga gulong, at ng mga karuwahe ay mayayanig ang iyong mga pader, kapag pumasok siya sa iyong mga pintuang-bayan, gaya ng pagpasok ng mga tao sa isang lungsod na nawasak na ang pader.
Rashi
From the abundance of his horses When there are many horses, they raise dust with their feet, which ascends and becomes like a cloud, darkening the earth. This is called שִּׁפְּעַת, an abundance. Similarly, (Job 22:11): “or an abundance of (וְשִּׁפְּעַת) water covers you,” de la foison in French, of abundance.
Rashi
as men enter a breached city as they enter a city that has been breached of its wall(Targum), that its wall has been breached.