The Quran root خ ل ص kh-l-ṣ

قُلْ أَتُحَاجُّونَنَا فِي اللَّهِ وَهُوَ رَبُّنَا وَرَبُّكُمْ وَلَنَا أَعْمَالُنَا وَلَكُمْ أَعْمَالُكُمْ وَنَحْنُ لَهُ مُخْلِصُونَ ١٣٩

مُخْلِصُونَ mukh'liṣūna · (are) sincere

Say, [O Muḥammad], "Do you argue with us about Allāh while He is our Lord and your Lord? For us are our deeds, and for you are your deeds. And we are sincere [in deed and intention] to Him." (Surah Al-Baqarah, 2:139)

قُلْ أَمَرَ رَبِّي بِالْقِسْطِ وَأَقِيمُوا وُجُوهَكُمْ عِندَ كُلِّ مَسْجِدٍ وَادْعُوهُ مُخْلِصِينَ لَهُ الدِّينَ كَمَا بَدَأَكُمْ تَعُودُونَ ٢٩

مُخْلِصِينَ mukh'liṣīna · (being) sincere

Say, [O Muḥammad], "My Lord has ordered justice and that you direct yourselves [to the Qiblah] at every place [or time] of prostration, and invoke Him, sincere to Him in religion." Just as He originated you, you will return [to life] - (Surah Al-A'raf, 7:29)

وَلَقَدْ هَمَّتْ بِهِ وَهَمَّ بِهَا لَوْلَا أَن رَّأَىٰ بُرْهَانَ رَبِّهِ كَذَٰلِكَ لِنَصْرِفَ عَنْهُ السُّوءَ وَالْفَحْشَاءَ إِنَّهُ مِنْ عِبَادِنَا الْمُخْلَصِينَ ٢٤

الْمُخْلَصِينَ l-mukh'laṣīna · the sincere

And she certainly determined [to seduce] him, and he would have inclined to her had he not seen the proof [i.e., sign] of his Lord. And thus [it was] that We should avert from him evil and immorality. Indeed, he was of Our chosen servants. (Surah Yusuf, 12:24)

قُلْ إِن كَانَتْ لَكُمُ الدَّارُ الْآخِرَةُ عِندَ اللَّهِ خَالِصَةً مِّن دُونِ النَّاسِ فَتَمَنَّوُا الْمَوْتَ إِن كُنتُمْ صَادِقِينَ ٩٤

خَالِصَةً khāliṣatan · exclusively

Say, [O Muḥammad], "If the home of the Hereafter with Allāh is for you alone and not the [other] people, then wish for death, if you should be truthful." (Surah Al-Baqarah, 2:94)

إِلَّا الَّذِينَ تَابُوا وَأَصْلَحُوا وَاعْتَصَمُوا بِاللَّهِ وَأَخْلَصُوا دِينَهُمْ لِلَّهِ فَأُولَٰئِكَ مَعَ الْمُؤْمِنِينَ وَسَوْفَ يُؤْتِ اللَّهُ الْمُؤْمِنِينَ أَجْرًا عَظِيمًا ١٤٦

وَأَخْلَصُوا wa-akhlaṣū · and are sincere

Except for those who repent, correct themselves, hold fast to Allāh, and are sincere in their religion for Allāh, for those will be with the believers. And Allāh is going to give the believers a great reward. (Surah An-Nisa, 4:146)

وَإِنَّ لَكُمْ فِي الْأَنْعَامِ لَعِبْرَةً نُّسْقِيكُم مِّمَّا فِي بُطُونِهِ مِن بَيْنِ فَرْثٍ وَدَمٍ لَّبَنًا خَالِصًا سَائِغًا لِّلشَّارِبِينَ ٦٦

خَالِصًا khāliṣan · pure

And indeed, for you in grazing livestock is a lesson. We give you drink from what is in their bellies - between excretion and blood - pure milk, palatable to drinkers. (Surah An-Nahl, 16:66)