• مَكَثَ
• مُكْث
• ٱمْكُثُوٓا۟
• مَّٰكِثِين
• يَمْكُثُ

Appears 7 times in the Quran.

1. 13:17 أَنزَلَ مِنَ ٱلسَّمَآءِ مَآءً فَسَالَتْ أَوْدِيَةٌۢ بِقَدَرِهَا فَٱحْتَمَلَ ٱلسَّيْلُ زَبَدًا رَّابِيًا وَمِمَّا يُوقِدُونَ عَلَيْهِ فِى ٱلنَّارِ ٱبْتِغَآءَ حِلْيَةٍ أَوْ مَتَٰعٍ زَبَدٌ مِّثْلُهُۥ كَذَٰلِكَ يَضْرِبُ ٱللَّهُ ٱلْحَقَّ وَٱلْبَٰطِلَ فَأَمَّا ٱلزَّبَدُ فَيَذْهَبُ جُفَآءً وَأَمَّا مَا يَنفَعُ ٱلنَّاسَ فَيَمْكُثُ فِى ٱلْأَرْضِ كَذَٰلِكَ يَضْرِبُ ٱللَّهُ ٱلْأَمْثَالَ

   He sends down water from the cloud, then watercourses flow (with water) according to their measure, and the torrent bears along the swelling foam, and from what they melt in the fire for the sake of making ornaments or apparatus arises a scum like it; thus does Allah compare truth and falsehood; then as for the scum, it passes away as a worthless thing; and as for that which profits the people, it tarries in the earth; thus does Allah set forth parables.
   

2. 17:106 وَقُرْءَانًا فَرَقْنَٰهُ لِتَقْرَأَهُۥ عَلَى ٱلنَّاسِ عَلَىٰ مُكْثٍ وَنَزَّلْنَٰهُ تَنزِيلًا

   And it is a Quran which We have revealed in portions so that you may read it to the people by slow degrees, and We have revealed it, revealing in portions.
   

3. 18:3 مَّٰكِثِينَ فِيهِ أَبَدًا

   Staying in it for ever;
   

4. 20:10 إِذْ رَءَا نَارًا فَقَالَ لِأَهْلِهِ ٱمْكُثُوٓا۟ إِنِّىٓ ءَانَسْتُ نَارًا لَّعَلِّىٓ ءَاتِيكُم مِّنْهَا بِقَبَسٍ أَوْ أَجِدُ عَلَى ٱلنَّارِ هُدًى

   When he saw fire, he said to his family: Stop, for surely I see a fire, haply I may bring to you therefrom a live coal or find a guidance at the fire.
   

5. 27:22 فَمَكَثَ غَيْرَ بَعِيدٍ فَقَالَ أَحَطتُ بِمَا لَمْ تُحِطْ بِهِۦ وَجِئْتُكَ مِن سَبَإٍۭ بِنَبَإٍ يَقِينٍ

   And he tarried not long, then said: I comprehend that which you do not comprehend and I have brought to you a sure information from Sheba.
   

6. 28:29 فَلَمَّا قَضَىٰ مُوسَى ٱلْأَجَلَ وَسَارَ بِأَهْلِهِۦٓ ءَانَسَ مِن جَانِبِ ٱلطُّورِ نَارًا قَالَ لِأَهْلِهِ ٱمْكُثُوٓا۟ إِنِّىٓ ءَانَسْتُ نَارًا لَّعَلِّىٓ ءَاتِيكُم مِّنْهَا بِخَبَرٍ أَوْ جَذْوَةٍ مِّنَ ٱلنَّارِ لَعَلَّكُمْ تَصْطَلُونَ

   So when Musa had fulfilled the term, and he journeyed with his family, he perceived on this side of the mountain a fire. He said to his family: Wait, I have seen a fire, maybe I will bring to you from it some news or a brand of fire, so that you may warm yourselves.
   

7. 43:77 وَنَادَوْا۟ يَٰمَٰلِكُ لِيَقْضِ عَلَيْنَا رَبُّكَ قَالَ إِنَّكُم مَّٰكِثُونَ

   And they shall call out: O Malik! let your Lord make an end of us. He shall say: Surely you shall tarry.