Qaynī is explained in relation to qayn, an artisan or craftsman, suggesting well-made conveyances or equipment. Qashīb means new or fresh, and mufʾam spacious or ample. The commentary also notes a variant reading ʿalā kulli jarī.
The precise textual variation should not be concealed. The overall picture remains that the caravan rides in fresh, roomy, well-made equipment, which is then put to use in crossing the route.