«عَلَيْهِ سَمَلٌ وَفِي مِشْيَتِهِ قَزَلٌ»
He wore ragged clothing, and his gait showed a limp.
ʿAlayhi functions as a fronted prepositional predicate; the indefinite samalun is the delayed subject. The same pattern recurs with fī mishyatihi and qazalun. Two nominal clauses characterize the stranger.
Placing the location or possessor first establishes what the statement is about before naming the ragged garment or limp. The structure describes an observed state rather than two separately narrated actions.