The Quran root ز ك و z-k-w

وَأَقِيمُوا الصَّلَاةَ وَآتُوا الزَّكَاةَ وَارْكَعُوا مَعَ الرَّاكِعِينَ ٤٣

الزَّكَاةَ l-zakata · zakah

And establish prayer and give zakāh and bow with those who bow [in worship and obedience]. (Surah Al-Baqarah, 2:43)

وَإِذْ أَخَذْنَا مِيثَاقَ بَنِي إِسْرَائِيلَ لَا تَعْبُدُونَ إِلَّا اللَّهَ وَبِالْوَالِدَيْنِ إِحْسَانًا وَذِي الْقُرْبَىٰ وَالْيَتَامَىٰ وَالْمَسَاكِينِ وَقُولُوا لِلنَّاسِ حُسْنًا وَأَقِيمُوا الصَّلَاةَ وَآتُوا الزَّكَاةَ ثُمَّ تَوَلَّيْتُمْ إِلَّا قَلِيلًا مِّنكُمْ وَأَنتُم مُّعْرِضُونَ ٨٣

الزَّكَاةَ l-zakata · the zakah

And [recall] when We took the covenant from the Children of Israel, [enjoining upon them], "Do not worship except Allāh; and to parents do good and to relatives, orphans, and the needy. And speak to people good [words] and establish prayer and give zakāh." Then you turned away, except a few of you, and you were refusing. (Surah Al-Baqarah, 2:83)

رَبَّنَا وَابْعَثْ فِيهِمْ رَسُولًا مِّنْهُمْ يَتْلُو عَلَيْهِمْ آيَاتِكَ وَيُعَلِّمُهُمُ الْكِتَابَ وَالْحِكْمَةَ وَيُزَكِّيهِمْ إِنَّكَ أَنتَ الْعَزِيزُ الْحَكِيمُ ١٢٩

وَيُزَكِّيهِمْ wayuzakkīhim · and purify them

Our Lord, and send among them a messenger from themselves who will recite to them Your verses and teach them the Book and wisdom and purify them. Indeed, You are the Exalted in Might, the Wise." (Surah Al-Baqarah, 2:129)

جَنَّاتُ عَدْنٍ تَجْرِي مِن تَحْتِهَا الْأَنْهَارُ خَالِدِينَ فِيهَا وَذَٰلِكَ جَزَاءُ مَن تَزَكَّىٰ ٧٦

تَزَكَّىٰ tazakkā · purifies himself

Gardens of perpetual residence beneath which rivers flow, wherein they abide eternally. And that is the reward of one who purifies himself. (Surah Taha, 20:76)

وَإِذَا طَلَّقْتُمُ النِّسَاءَ فَبَلَغْنَ أَجَلَهُنَّ فَلَا تَعْضُلُوهُنَّ أَن يَنكِحْنَ أَزْوَاجَهُنَّ إِذَا تَرَاضَوْا بَيْنَهُم بِالْمَعْرُوفِ ذَٰلِكَ يُوعَظُ بِهِ مَن كَانَ مِنكُمْ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الْآخِرِ ذَٰلِكُمْ أَزْكَىٰ لَكُمْ وَأَطْهَرُ وَاللَّهُ يَعْلَمُ وَأَنتُمْ لَا تَعْلَمُونَ ٢٣٢

أَزْكَىٰ azkā · (is) more virtuous

And when you divorce women and they have fulfilled their term, do not prevent them from remarrying their [former] husbands if they [i.e., all parties] agree among themselves on an acceptable basis. That is instructed to whoever of you believes in Allāh and the Last Day. That is better for you and purer, and Allāh knows and you know not. (Surah Al-Baqarah, 2:232)

فَانطَلَقَا حَتَّىٰ إِذَا لَقِيَا غُلَامًا فَقَتَلَهُ قَالَ أَقَتَلْتَ نَفْسًا زَكِيَّةً بِغَيْرِ نَفْسٍ لَّقَدْ جِئْتَ شَيْئًا نُّكْرًا ٧٤

زَكِيَّةً zakiyyatan · pure

So they set out, until when they met a boy, he [i.e., al-Khiḍr] killed him. [Moses] said, "Have you killed a pure soul for other than [having killed] a soul? You have certainly done a deplorable thing." (Surah Al-Kahf, 18:74)