• سَمّ
• سَمُوم

Appears 4 times in the Quran.

1. 7:40 إِنَّ ٱلَّذِينَ كَذَّبُوا۟ بِـَٔايَٰتِنَا وَٱسْتَكْبَرُوا۟ عَنْهَا لَا تُفَتَّحُ لَهُمْ أَبْوَٰبُ ٱلسَّمَآءِ وَلَا يَدْخُلُونَ ٱلْجَنَّةَ حَتَّىٰ يَلِجَ ٱلْجَمَلُ فِى سَمِّ ٱلْخِيَاطِ وَكَذَٰلِكَ نَجْزِى ٱلْمُجْرِمِينَ

   Surely (as for) those who reject Our communications and turn away from them haughtily, the doors of heaven shall not be opened for them, nor shall they enter the garden until the camel pass through the eye of the needle; and thus do We reward the guilty.
   

2. 15:27 وَٱلْجَآنَّ خَلَقْنَٰهُ مِن قَبْلُ مِن نَّارِ ٱلسَّمُومِ

   And the jinn We created before, of intensely hot fire.
   

3. 52:27 فَمَنَّ ٱللَّهُ عَلَيْنَا وَوَقَىٰنَا عَذَابَ ٱلسَّمُومِ

   But Allah has been gracious to us and He has saved us from the punishment of the hot wind:
   

4. 56:42 فِى سَمُومٍ وَحَمِيمٍ

   In hot wind and boiling water,