• خَيْل
• خَيْلكَ
• مُخْتَال
• يُخَيَّلُ

Appears 9 times in the Quran.

1. 3:14 زُيِّنَ لِلنَّاسِ حُبُّ ٱلشَّهَوَٰتِ مِنَ ٱلنِّسَآءِ وَٱلْبَنِينَ وَٱلْقَنَٰطِيرِ ٱلْمُقَنطَرَةِ مِنَ ٱلذَّهَبِ وَٱلْفِضَّةِ وَٱلْخَيْلِ ٱلْمُسَوَّمَةِ وَٱلْأَنْعَٰمِ وَٱلْحَرْثِ ذَٰلِكَ مَتَٰعُ ٱلْحَيَوٰةِ ٱلدُّنْيَا وَٱللَّهُ عِندَهُۥ حُسْنُ ٱلْمَـَٔابِ

   The love of desires, of women and sons and hoarded treasures of gold and silver and well bred horses and cattle and tilth, is made to seem fair to men; this is the provision of the life of this world; and Allah is He with Whom is the good goal (of life).
   

2. 4:36 وَٱعْبُدُوا۟ ٱللَّهَ وَلَا تُشْرِكُوا۟ بِهِۦ شَيْـًٔا وَبِٱلْوَٰلِدَيْنِ إِحْسَٰنًا وَبِذِى ٱلْقُرْبَىٰ وَٱلْيَتَٰمَىٰ وَٱلْمَسَٰكِينِ وَٱلْجَارِ ذِى ٱلْقُرْبَىٰ وَٱلْجَارِ ٱلْجُنُبِ وَٱلصَّاحِبِ بِٱلْجَنۢبِ وَٱبْنِ ٱلسَّبِيلِ وَمَا مَلَكَتْ أَيْمَٰنُكُمْ إِنَّ ٱللَّهَ لَا يُحِبُّ مَن كَانَ مُخْتَالًا فَخُورًا

   And serve Allah and do not associate any thing with Him and be good to the parents and to the near of kin and the orphans and the needy and the neighbor of (your) kin and the alien neighbor, and the companion in a journey and the wayfarer and those whom your right hands possess; surely Allah does not love him who is proud, boastful;
   

3. 8:60 وَأَعِدُّوا۟ لَهُم مَّا ٱسْتَطَعْتُم مِّن قُوَّةٍ وَمِن رِّبَاطِ ٱلْخَيْلِ تُرْهِبُونَ بِهِۦ عَدُوَّ ٱللَّهِ وَعَدُوَّكُمْ وَءَاخَرِينَ مِن دُونِهِمْ لَا تَعْلَمُونَهُمُ ٱللَّهُ يَعْلَمُهُمْ وَمَا تُنفِقُوا۟ مِن شَىْءٍ فِى سَبِيلِ ٱللَّهِ يُوَفَّ إِلَيْكُمْ وَأَنتُمْ لَا تُظْلَمُونَ

   And prepare against them what force you can and horses tied at the frontier, to frighten thereby the enemy of Allah and your enemy and others besides them, whom you do not know (but) Allah knows them; and whatever thing you will spend in Allah's way, it will be paid back to you fully and you shall not be dealt with unjustly.
   

4. 16:8 وَٱلْخَيْلَ وَٱلْبِغَالَ وَٱلْحَمِيرَ لِتَرْكَبُوهَا وَزِينَةً وَيَخْلُقُ مَا لَا تَعْلَمُونَ

   And (He made) horses and mules and asses that you might ride upon them and as an ornament; and He creates what you do not know.
   

5. 17:64 وَٱسْتَفْزِزْ مَنِ ٱسْتَطَعْتَ مِنْهُم بِصَوْتِكَ وَأَجْلِبْ عَلَيْهِم بِخَيْلِكَ وَرَجِلِكَ وَشَارِكْهُمْ فِى ٱلْأَمْوَٰلِ وَٱلْأَوْلَٰدِ وَعِدْهُمْ وَمَا يَعِدُهُمُ ٱلشَّيْطَٰنُ إِلَّا غُرُورًا

   And beguile whomsoever of them you can with your voice, and collect against them your forces riding and on foot, and share with them in wealth and children, and hold out promises to them; and the Shaitan makes not promises to them but to deceive:
   

6. 20:66 قَالَ بَلْ أَلْقُوا۟ فَإِذَا حِبَالُهُمْ وَعِصِيُّهُمْ يُخَيَّلُ إِلَيْهِ مِن سِحْرِهِمْ أَنَّهَا تَسْعَىٰ

   He said: Nay! cast down. then lo! their cords and their rods-- it was imaged to him on account of their magic as if they were running.
   

7. 31:18 وَلَا تُصَعِّرْ خَدَّكَ لِلنَّاسِ وَلَا تَمْشِ فِى ٱلْأَرْضِ مَرَحًا إِنَّ ٱللَّهَ لَا يُحِبُّ كُلَّ مُخْتَالٍ فَخُورٍ

   And do not turn your face away from people in contempt, nor go about in the land exulting overmuch; surely Allah does not love any self-conceited boaster;
   

8. 57:23 لِّكَيْلَا تَأْسَوْا۟ عَلَىٰ مَا فَاتَكُمْ وَلَا تَفْرَحُوا۟ بِمَآ ءَاتَىٰكُمْ وَٱللَّهُ لَا يُحِبُّ كُلَّ مُخْتَالٍ فَخُورٍ

   So that you may not grieve for what has escaped you, nor be exultant at what He has given you; and Allah does not love any arrogant boaster:
   

9. 59:6 وَمَآ أَفَآءَ ٱللَّهُ عَلَىٰ رَسُولِهِۦ مِنْهُمْ فَمَآ أَوْجَفْتُمْ عَلَيْهِ مِنْ خَيْلٍ وَلَا رِكَابٍ وَلَٰكِنَّ ٱللَّهَ يُسَلِّطُ رُسُلَهُۥ عَلَىٰ مَن يَشَآءُ وَٱللَّهُ عَلَىٰ كُلِّ شَىْءٍ قَدِيرٌ

   And whatever Allah restored to His Messenger from them you did not press forward against it any horse or a riding camel but Allah gives authority to His messengers against whom He pleases, and Allah has power over all things.