وَسَارِيَتَيْ بَلَنْطٍ أَوْ رُخَامٍ يَرِنُّ خَشَاشُ حِلْيِهِمَا رَنِينَا
Her two legs are compared to columns of polished stone or marble, and the ornaments upon them make a ringing sound.
Sāriyatayn is the dual of “pillar”; balanṭ refers to a kind of hard stone and rukhām to marble. Khashāsh ḥilyihimā describes elements of the ornaments.
The image combines sight—smooth, upright pillars—with sound—the ringing of jewellery. That sensory pairing makes the simile more dynamic.