صُحُفِ إِبْرَٰهِيمَ وَمُوسَىٰ ۝١٩ Why is إِبْرَٰهِيمَ genitive with fatḥah?

Surah Al-A‘la — Part 2

• It is an object
• It is a verb
• It is diptote
• It is a predicate