In مِنْ شَرِّ, nūn sākinah precedes shīn and is subject to ikhfāʾ.
But the linked form مِنَ الْجِنَّةِ has a fatḥah on nūn: hamzat al-waṣl is omitted in linking, and the nūn is vowelled to avoid two successive unvowelled consonants. Therefore do not apply the “nūn sākinah before jīm” rule here.
The lesson is methodological: examine the vowels actually pronounced in the connected phrase before assigning a rule.
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Al-Nās: the distinction between min and mina
Applied Tajwīd Diagnostics: Four Short Sūrahs
In مِنْ شَرِّ, nūn sākinah precedes shīn and is subject to ikhfāʾ.
But the linked form مِنَ الْجِنَّةِ has a fatḥah on nūn: hamzat al-waṣl is omitted in linking, and the nūn is vowelled to avoid two successive unvowelled consonants. Therefore do not apply the “nūn sākinah before jīm” rule here.
The lesson is methodological: examine the vowels actually pronounced in the connected phrase before assigning a rule.