وَوَرَّكْنَ فِي السُّوبَانِ يَعْلُونَ مَتْنَهُ عَلَيْهِنَّ دَلُّ النَّاعِمِ الْمُتَنَعِّمِ
They rode across the elevated tract of al-Sūbān, climbing its back; their bearing showed the grace of women accustomed to comfort.
Al-Sūbān names an elevated tract. In yaʿlūna matnahu, the travellers climb its “back”; matn literally means a back but can describe raised terrain. The geographical image is made bodily and therefore easily visualized.
Dall al-nāʿim al-mutanaʿʿim suggests graceful manner and familiarity with comfort. The line adds characterization to motion rather than reporting only the caravan’s route.