The Quran root خ ب ث kh-b-th

يَا أَيُّهَا الَّذِينَ آمَنُوا أَنفِقُوا مِن طَيِّبَاتِ مَا كَسَبْتُمْ وَمِمَّا أَخْرَجْنَا لَكُم مِّنَ الْأَرْضِ وَلَا تَيَمَّمُوا الْخَبِيثَ مِنْهُ تُنفِقُونَ وَلَسْتُم بِآخِذِيهِ إِلَّا أَن تُغْمِضُوا فِيهِ وَاعْلَمُوا أَنَّ اللَّهَ غَنِيٌّ حَمِيدٌ ٢٦٧

الْخَبِيثَ l-khabītha · the bad

O you who have believed, spend from the good things which you have earned and from that which We have produced for you from the earth. And do not aim toward the defective therefrom, spending [from that] while you would not take it [yourself] except with closed eyes. And know that Allāh is Free of need and Praiseworthy. (Surah Al-Baqarah, 2:267)

مَّا كَانَ اللَّهُ لِيَذَرَ الْمُؤْمِنِينَ عَلَىٰ مَا أَنتُمْ عَلَيْهِ حَتَّىٰ يَمِيزَ الْخَبِيثَ مِنَ الطَّيِّبِ وَمَا كَانَ اللَّهُ لِيُطْلِعَكُمْ عَلَى الْغَيْبِ وَلَٰكِنَّ اللَّهَ يَجْتَبِي مِن رُّسُلِهِ مَن يَشَاءُ فَآمِنُوا بِاللَّهِ وَرُسُلِهِ وَإِن تُؤْمِنُوا وَتَتَّقُوا فَلَكُمْ أَجْرٌ عَظِيمٌ ١٧٩

الْخَبِيثَ l-khabītha · the evil

Allāh would not leave the believers in that [state] you are in [presently] until He separates the evil from the good. Nor would Allāh reveal to you the unseen. But [instead], Allāh chooses of His messengers whom He wills, so believe in Allāh and His messengers. And if you believe and fear Him, then for you is a great reward. (Surah Ali 'Imran, 3:179)

الَّذِينَ يَتَّبِعُونَ الرَّسُولَ النَّبِيَّ الْأُمِّيَّ الَّذِي يَجِدُونَهُ مَكْتُوبًا عِندَهُمْ فِي التَّوْرَاةِ وَالْإِنجِيلِ يَأْمُرُهُم بِالْمَعْرُوفِ وَيَنْهَاهُمْ عَنِ الْمُنكَرِ وَيُحِلُّ لَهُمُ الطَّيِّبَاتِ وَيُحَرِّمُ عَلَيْهِمُ الْخَبَائِثَ وَيَضَعُ عَنْهُمْ إِصْرَهُمْ وَالْأَغْلَالَ الَّتِي كَانَتْ عَلَيْهِمْ فَالَّذِينَ آمَنُوا بِهِ وَعَزَّرُوهُ وَنَصَرُوهُ وَاتَّبَعُوا النُّورَ الَّذِي أُنزِلَ مَعَهُ أُولَٰئِكَ هُمُ الْمُفْلِحُونَ ١٥٧

الْخَبَائِثَ l-khabāitha · the impure things

Those who follow the Messenger, the unlettered prophet, whom they find written [i.e., described] in what they have of the Torah and the Gospel, who enjoins upon them what is right and prohibits them from what is wrong and makes lawful for them what is good and forbids them from what is evil and relieves them of their burden and the shackles which were upon them. So they who have believed in him, honored him, supported him and followed the light which was sent down with him - it is those who will be the successful. (Surah Al-A'raf, 7:157)

وَالْبَلَدُ الطَّيِّبُ يَخْرُجُ نَبَاتُهُ بِإِذْنِ رَبِّهِ وَالَّذِي خَبُثَ لَا يَخْرُجُ إِلَّا نَكِدًا كَذَٰلِكَ نُصَرِّفُ الْآيَاتِ لِقَوْمٍ يَشْكُرُونَ ٥٨

خَبُثَ khabutha · is bad

And the good land - its vegetation emerges by permission of its Lord; but that which is bad - nothing emerges except sparsely, with difficulty. Thus do We diversify the signs for a people who are grateful. (Surah Al-A'raf, 7:58)