ثُمَّ لَنَنْزِعَنَّ مِنْ كُلِّ شِيعَةٍ أَيُّهُمْ أَشَدُّ عَلَى الرَّحْمَٰنِ عِتِيًّا
Translation: Then We shall certainly draw out from each group whoever is most defiant toward the Most Merciful.
This is Qurʾān 19:69. On the classical analysis presented in the book, «أَيُّهُمْ» is built on ḍammah in an accusative syntactic position after omission of an initial «هُوَ»: «أَيُّهُمْ هُوَ أَشَدُّ».
أَشَدُّ is the predicate of the omitted mubtadaʾ; عِتِيًّا is accusative tamyīz. Other classical analyses of this verse also exist.