The remaining elements of the sentence:
3. أَبُوهُ: fāʿil of the active participle “ḍārib”; nominative with wāw because it is one of the six special nouns. It is muḍāf, and the attached pronoun ـهُ is in the genitive position as muḍāf ilayh.
4. عَمْرًا: direct object of “ḍārib”; accusative with visible fatḥa.
Notice that the wāw in أبوه marks nominative case, while the attached pronoun is genitive by annexation. The fatḥa on عمرا marks the object.
Opening interactive controls...
Al-Marfūʿāt: The Fāʿil, Its Definition and Full Parsing
The remaining elements of the sentence:
3. أَبُوهُ: fāʿil of the active participle “ḍārib”; nominative with wāw because it is one of the six special nouns. It is muḍāf, and the attached pronoun ـهُ is in the genitive position as muḍāf ilayh.
4. عَمْرًا: direct object of “ḍārib”; accusative with visible fatḥa.
Notice that the wāw in أبوه marks nominative case, while the attached pronoun is genitive by annexation. The fatḥa on عمرا marks the object.