وَرَمَى دَوَابِرَهَا السَّفَا وَتَهَيَّجَتْ ۞ رِيحُ الْمَصَايِفِ سَوْمُهَا وَسُهَامُهَا
As they hurried, pebbles flew behind their hind feet; the summer winds rose in their scorching force and severity.
Dawābir refers to the hind parts or hind feet, while safā denotes small hard stones or pebbles. Tahayyajat expresses rising and intensifying. Instead of simply asserting that the animals run fast, the poet makes us see the consequences: scattering gravel and harsh wind.