Make two separate decisions about the pronoun's hāʾ. First establish its vowel or transmitted sukūn. Then ask whether that vowel receives ṣilah (vocal extension).
In the usual case, mobile letters on both sides allow ṣilah, but no automatic elongation follows every pronoun hāʾ.
In مِنْهُ, the preceding nūn is sākin, so the normal condition is not met.
فِيهِ مُهَانًا is a specified exception in the course; do not force it into the standard condition.
Specific sākin examples such as أَرْجِهْ and فَأَلْقِهْ must not be given an invented vowel.
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Hāʾ al-ḍamīr: vowel before ṣilah
Comprehensive Revision — Applying Tajwīd Rules
Make two separate decisions about the pronoun's hāʾ. First establish its vowel or transmitted sukūn. Then ask whether that vowel receives ṣilah (vocal extension).
In the usual case, mobile letters on both sides allow ṣilah, but no automatic elongation follows every pronoun hāʾ.
In مِنْهُ, the preceding nūn is sākin, so the normal condition is not met.
فِيهِ مُهَانًا is a specified exception in the course; do not force it into the standard condition.
Specific sākin examples such as أَرْجِهْ and فَأَلْقِهْ must not be given an invented vowel.