﴿ فِى جِيدِهَا حَبْلٌۭ مِّن مَّسَدٍۭ ﴾

“[who bears] around her neck a rope of twisted strands!”

with a rope of palm-fibre around her neck fī jīdihā hablun min masadin is a circumstantial qualifier referring to hammālata’l-hatab which in turn is either a description of imra’atahu ‘his wife’ or the predicate of an implied subject.