"Do they not know that whoever opposes Allah and His Messenger"—meaning: whoever acts with hostility toward Allah and His Messenger—
"then for him is the fire of Hell."
Muhammad says: The meaning of His saying, "whoever opposes Allah and His Messenger," is: whoever is in one boundary (hadd) while Allah and His Messenger are in another boundary; meaning: a different side. The phrase "fa-anna lahu" (then for him) is read with both the fathah (a-vowel) and the kasrah (i-vowel). Whoever reads it with the kasrah (fa-inna lahu) does so based on the start of a new clause, as when you say: "For indeed, for him is the fire of Hell," where 'inna' is included for emphasis. Whoever reads it with the fathah (fa-anna lahu), it is merely a repetition of the first 'anna' for emphasis, because when the speech became lengthy, repeating it was more emphatic.
Surah At-Tawbah, from verse (64) to verse (67).
﴿أَلَمْ يَعْلَمُوا أَنَّهُ مَنْ يُحَادِدِ الله وَرَسُوله﴾ أَيْ: مَنْ يُعَادِ اللَّهَ وَرَسُولَهُ.
﴿فَأن لَهُ نَار جَهَنَّم﴾.
قَالَ مُحَمَّدٌ: قَوْلُهُ: ﴿مَنْ يُحَادِدِ الله وَرَسُوله﴾ مَعْنَاهُ: مَنْ يَكُونُ فِي حدٍّ، وَاللَّهُ وَرَسُولُهُ فِي حدٍّ؛ أَيْ: جَانب. وتقرأ (فَأن لَهُ) بِالْفَتْحِ وَالْكَسْرِ فَمَنْ كَسَرَ فَعَلَى الاسْتِئْنَافِ؛ كَمَا تَقُولُ: فَإِنَّ لَهُ نَارَ جَهَنَّمَ، وَدَخَلَتْ (إِنَّ) مُؤَكِّدَةً. وَمَنْ قَرَأَ بِالْفَتْحِ (فَأَنَّ لَهُ)، فَإِنَّمَا أَعَادَ (أَنَّ) الأُولَى تَوْكِيدًا؛ لأَنَّهُ لَمَّا طَالَ الْكَلامُ كَانَ إِعَادَتهَا أوكد.
سُورَة التَّوْبَة من الْآيَة (٦٤) إِلَى الْآيَة (٦٧).