نِصْفُهُ لِي بِسَهْمِ مَبَرَّتِي وَسَهْمُكَ لِي عَنْ أَرْشِ إِبْرِي
Half is mine as my share of benevolence, and your share is mine against the damage to my needle.
The elder appears to split the money but constructs a reason to keep both portions. Sahm means a share; arsh refers to compensation. The serious vocabulary of division is placed in a comically self-serving argument.