«جزى بنوه أبا الغيلان عن كبر، وحسن فعل كما يجزى سنمار»
His sons recompensed Abū al-Ghaylān for old age and good deeds as Sinimmār was recompensed.
The hāʾ pronoun in «بنوه» refers to «أبا الغيلان», which occurs later. The source uses this ordering to illustrate a pronoun preceding its antecedent in wording and grammatical rank.
The historical or moral image of recompense is secondary here. The specific grammatical issue is antecedent reference, not the thematic significance of the verse.