يُكَفِّرْ
Appears 3 times in the Quran.
(Root: كفر)
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8:29 يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِن تَتَّقُوا۟ ٱللَّهَ يَجْعَل لَّكُمْ فُرْقَانًا وَيُكَفِّرْ عَنكُمْ سَيِّـَٔاتِكُمْ وَيَغْفِرْ لَكُمْ وَٱللَّهُ ذُو ٱلْفَضْلِ ٱلْعَظِيمِ
O you who believe! If you are careful of (your duty to) Allah, He will grant you a distinction and do away with your evils and forgive you; and Allah is the Lord of mighty grace.
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64:9 يَوْمَ يَجْمَعُكُمْ لِيَوْمِ ٱلْجَمْعِ ذَٰلِكَ يَوْمُ ٱلتَّغَابُنِ وَمَن يُؤْمِنۢ بِٱللَّهِ وَيَعْمَلْ صَٰلِحًا يُكَفِّرْ عَنْهُ سَيِّـَٔاتِهِۦ وَيُدْخِلْهُ جَنَّٰتٍ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ خَٰلِدِينَ فِيهَآ أَبَدًا ذَٰلِكَ ٱلْفَوْزُ ٱلْعَظِيمُ
On the day that He will gather you for the day of gathering, that is the day of loss and gain; and whoever believes in Allah and does good, He will remove from him his evil and cause him to enter gardens beneath which rivers flow, to abide therein forever; that is the great achievement.
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65:5 ذَٰلِكَ أَمْرُ ٱللَّهِ أَنزَلَهُۥٓ إِلَيْكُمْ وَمَن يَتَّقِ ٱللَّهَ يُكَفِّرْ عَنْهُ سَيِّـَٔاتِهِۦ وَيُعْظِمْ لَهُۥٓ أَجْرًا
That is the command of Allah which He has revealed to you, and whoever is careful of (his duty to) Allah, He will remove from him his evil and give him a big reward.