وَيَجُوزُ فِي مِثْلِ «لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ» خَمْسَةُ أَوْجُهٍ: فَتْحُهُمَا، وَرَفْعُهُمَا، وَفَتْحُ الْأَوَّلِ وَنَصْبُ الثَّانِي، وَفَتْحُ الْأَوَّلِ وَرَفْعُ الثَّانِي، وَرَفْعُ الْأَوَّلِ وَفَتْحُ الثَّانِي.
Translation: Five readings are permissible in this expression: both with fatḥ; both nominative; first with fatḥ and second accusative; first with fatḥ and second nominative; or first nominative and second with fatḥ.
The book records five case patterns for «لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ», differing in fatḥ, rafʿ, and naṣb on the two nouns.
Study these as established grammatical readings, not a license to change vowels arbitrarily. Start with the familiar built-on-fatḥ pattern.