• كَالُوهُمْ
• ٱكْتَالُوا۟
• كِلْتُمْ
• كَيْل
• مِكْيَال
• نَكْتَلْ

Appears 13 times in the Quran.

1. 6:152 وَلَا تَقْرَبُوا۟ مَالَ ٱلْيَتِيمِ إِلَّا بِٱلَّتِى هِىَ أَحْسَنُ حَتَّىٰ يَبْلُغَ أَشُدَّهُۥ وَأَوْفُوا۟ ٱلْكَيْلَ وَٱلْمِيزَانَ بِٱلْقِسْطِ لَا نُكَلِّفُ نَفْسًا إِلَّا وُسْعَهَا وَإِذَا قُلْتُمْ فَٱعْدِلُوا۟ وَلَوْ كَانَ ذَا قُرْبَىٰ وَبِعَهْدِ ٱللَّهِ أَوْفُوا۟ ذَٰلِكُمْ وَصَّىٰكُم بِهِۦ لَعَلَّكُمْ تَذَكَّرُونَ

   And do not approach the property of the orphan except in the best manner until he attains his maturity, and give full measure and weight with justice-- We do not impose on any soul a duty except to the extent of its ability; and when you speak, then be just though it be (against) a relative, and fulfill Allah's covenant; this He has enjoined you with that you may be mindful;
   

2. 7:85 وَإِلَىٰ مَدْيَنَ أَخَاهُمْ شُعَيْبًا قَالَ يَٰقَوْمِ ٱعْبُدُوا۟ ٱللَّهَ مَا لَكُم مِّنْ إِلَٰهٍ غَيْرُهُۥ قَدْ جَآءَتْكُم بَيِّنَةٌ مِّن رَّبِّكُمْ فَأَوْفُوا۟ ٱلْكَيْلَ وَٱلْمِيزَانَ وَلَا تَبْخَسُوا۟ ٱلنَّاسَ أَشْيَآءَهُمْ وَلَا تُفْسِدُوا۟ فِى ٱلْأَرْضِ بَعْدَ إِصْلَٰحِهَا ذَٰلِكُمْ خَيْرٌ لَّكُمْ إِن كُنتُم مُّؤْمِنِينَ

   And to Madyan (We sent) their brother Shu'aib. He said: O my people! serve Allah, you have no god other than Him; clear proof indeed has come to you from your Lord, therefore give full measure and weight and do not diminish to men their things, and do not make mischief in the land after its reform; this is better for you if you are believers:
   

3. 11:84 وَإِلَىٰ مَدْيَنَ أَخَاهُمْ شُعَيْبًا قَالَ يَٰقَوْمِ ٱعْبُدُوا۟ ٱللَّهَ مَا لَكُم مِّنْ إِلَٰهٍ غَيْرُهُۥ وَلَا تَنقُصُوا۟ ٱلْمِكْيَالَ وَٱلْمِيزَانَ إِنِّىٓ أَرَىٰكُم بِخَيْرٍ وَإِنِّىٓ أَخَافُ عَلَيْكُمْ عَذَابَ يَوْمٍ مُّحِيطٍ

   And to Madyan (We sent) their brother Shu'aib. He said: O my people! serve Allah, you have no god other than He, and do not give short measure and weight: surely I see you in prosperity and surely I fear for you the punishment of an all-encompassing day.
   

4. 11:85 وَيَٰقَوْمِ أَوْفُوا۟ ٱلْمِكْيَالَ وَٱلْمِيزَانَ بِٱلْقِسْطِ وَلَا تَبْخَسُوا۟ ٱلنَّاسَ أَشْيَآءَهُمْ وَلَا تَعْثَوْا۟ فِى ٱلْأَرْضِ مُفْسِدِينَ

   And, O my people! give full measure and weight fairly, and defraud not men their things, and do not act corruptly in the land, making mischief:
   

5. 12:59 وَلَمَّا جَهَّزَهُم بِجَهَازِهِمْ قَالَ ٱئْتُونِى بِأَخٍ لَّكُم مِّنْ أَبِيكُمْ أَلَا تَرَوْنَ أَنِّىٓ أُوفِى ٱلْكَيْلَ وَأَنَا۠ خَيْرُ ٱلْمُنزِلِينَ

   And when he furnished them with their provision, he said: Bring to me a brother of yours from your father; do you not see that I give full measure and that I am the best of hosts?
   

6. 12:60 فَإِن لَّمْ تَأْتُونِى بِهِۦ فَلَا كَيْلَ لَكُمْ عِندِى وَلَا تَقْرَبُونِ

   But if you do not bring him to me, you shall have no measure (of corn) from me, nor shall you come near me.
   

7. 12:63 فَلَمَّا رَجَعُوٓا۟ إِلَىٰٓ أَبِيهِمْ قَالُوا۟ يَٰٓأَبَانَا مُنِعَ مِنَّا ٱلْكَيْلُ فَأَرْسِلْ مَعَنَآ أَخَانَا نَكْتَلْ وَإِنَّا لَهُۥ لَحَٰفِظُونَ

   So when they returned to their father, they said: O our father, the measure is withheld from us, therefore send with us our brother, (so that) we may get the measure, and we will most surely guard him.
   

8. 12:65 وَلَمَّا فَتَحُوا۟ مَتَٰعَهُمْ وَجَدُوا۟ بِضَٰعَتَهُمْ رُدَّتْ إِلَيْهِمْ قَالُوا۟ يَٰٓأَبَانَا مَا نَبْغِى هَٰذِهِۦ بِضَٰعَتُنَا رُدَّتْ إِلَيْنَا وَنَمِيرُ أَهْلَنَا وَنَحْفَظُ أَخَانَا وَنَزْدَادُ كَيْلَ بَعِيرٍ ذَٰلِكَ كَيْلٌ يَسِيرٌ

   And when they opened their goods, they found their money returned to them. They said: O our father! what (more) can we desire? This is our property returned to us, and we will bring corn for our family and guard our brother, and will have in addition the measure of a camel (load); this is an easy measure.
   

9. 12:88 فَلَمَّا دَخَلُوا۟ عَلَيْهِ قَالُوا۟ يَٰٓأَيُّهَا ٱلْعَزِيزُ مَسَّنَا وَأَهْلَنَا ٱلضُّرُّ وَجِئْنَا بِبِضَٰعَةٍ مُّزْجَىٰةٍ فَأَوْفِ لَنَا ٱلْكَيْلَ وَتَصَدَّقْ عَلَيْنَآ إِنَّ ٱللَّهَ يَجْزِى ٱلْمُتَصَدِّقِينَ

   So when they came in to him, they said: O chief! distress has afflicted us and our family and we have brought scanty money, so give us full measure and be charitable to us; surely Allah rewards the charitable.
   

10. 17:35 وَأَوْفُوا۟ ٱلْكَيْلَ إِذَا كِلْتُمْ وَزِنُوا۟ بِٱلْقِسْطَاسِ ٱلْمُسْتَقِيمِ ذَٰلِكَ خَيْرٌ وَأَحْسَنُ تَأْوِيلًا

    And give full measure when you measure out, and weigh with a true balance; this is fair and better in the end.
    

11. 26:181 أَوْفُوا۟ ٱلْكَيْلَ وَلَا تَكُونُوا۟ مِنَ ٱلْمُخْسِرِينَ

    Give a full measure and be not of those who diminish;
    

12. 83:2 ٱلَّذِينَ إِذَا ٱكْتَالُوا۟ عَلَى ٱلنَّاسِ يَسْتَوْفُونَ

    Who, when they take the measure (of their dues) from men take it fully,
    

13. 83:3 وَإِذَا كَالُوهُمْ أَو وَّزَنُوهُمْ يُخْسِرُونَ

    But when they measure out to others or weigh out for them, they are deficient.