Second general rule: an unvowelled yāʾ before the pronoun hāʾ leads to kasrah on the hāʾ. The source uses عَلَيْهِ, with «يْ» followed by «هِ».
Identify the yāʾ and the hāʾ as different sounds. A specific exception, عَلَيْهُ اللَّهَ, will show why the general pattern alone is not sufficient.
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Unvowelled yāʾ before hāʾ
Rules of Hāʾ al-Ḍamīr: Vowels, Ṣilah and Exceptions
Second general rule: an unvowelled yāʾ before the pronoun hāʾ leads to kasrah on the hāʾ. The source uses عَلَيْهِ, with «يْ» followed by «هِ».
Identify the yāʾ and the hāʾ as different sounds. A specific exception, عَلَيْهُ اللَّهَ, will show why the general pattern alone is not sufficient.