• أَقْطَار
• أَقْطَارهَا
• قِطْر
• قَطِرَان

Appears 5 times in the Quran.

1. 14:50 سَرَابِيلُهُم مِّن قَطِرَانٍ وَتَغْشَىٰ وُجُوهَهُمُ ٱلنَّارُ

   Their shirts made of pitch and the fire covering their faces
   

2. 18:96 ءَاتُونِى زُبَرَ ٱلْحَدِيدِ حَتَّىٰٓ إِذَا سَاوَىٰ بَيْنَ ٱلصَّدَفَيْنِ قَالَ ٱنفُخُوا۟ حَتَّىٰٓ إِذَا جَعَلَهُۥ نَارًا قَالَ ءَاتُونِىٓ أُفْرِغْ عَلَيْهِ قِطْرًا

   Bring me blocks of iron; until when he had filled up the space between the two mountain sides, he said: Blow, until when he had made it (as) fire, he said: Bring me molten brass which I may pour over it.
   

3. 33:14 وَلَوْ دُخِلَتْ عَلَيْهِم مِّنْ أَقْطَارِهَا ثُمَّ سُئِلُوا۟ ٱلْفِتْنَةَ لَءَاتَوْهَا وَمَا تَلَبَّثُوا۟ بِهَآ إِلَّا يَسِيرًا

   And if an entry were made upon them from the outlying parts of it, then they were asked to wage war, they would certainly have done it, and they would not have stayed in it but a little while.
   

4. 34:12 وَلِسُلَيْمَٰنَ ٱلرِّيحَ غُدُوُّهَا شَهْرٌ وَرَوَاحُهَا شَهْرٌ وَأَسَلْنَا لَهُۥ عَيْنَ ٱلْقِطْرِ وَمِنَ ٱلْجِنِّ مَن يَعْمَلُ بَيْنَ يَدَيْهِ بِإِذْنِ رَبِّهِۦ وَمَن يَزِغْ مِنْهُمْ عَنْ أَمْرِنَا نُذِقْهُ مِنْ عَذَابِ ٱلسَّعِيرِ

   And (We made) the wind (subservient) to Sulaiman, which made a month's journey in the morning and a month's journey m the evening, and We made a fountain of molten copper to flow out for him, and of the jinn there were those who worked before him by the command of his Lord; and whoever turned aside from Our command from among them, We made him taste of the punishment of burning.
   

5. 55:33 يَٰمَعْشَرَ ٱلْجِنِّ وَٱلْإِنسِ إِنِ ٱسْتَطَعْتُمْ أَن تَنفُذُوا۟ مِنْ أَقْطَارِ ٱلسَّمَٰوَٰتِ وَٱلْأَرْضِ فَٱنفُذُوا۟ لَا تَنفُذُونَ إِلَّا بِسُلْطَٰنٍ

   O assembly of the jinn and the men! If you are able to pass through the regions of the heavens and the earth, then pass through; you cannot pass through but with authority.