The Quran root أ ف ك ’-f-k

مَّا الْمَسِيحُ ابْنُ مَرْيَمَ إِلَّا رَسُولٌ قَدْ خَلَتْ مِن قَبْلِهِ الرُّسُلُ وَأُمُّهُ صِدِّيقَةٌ كَانَا يَأْكُلَانِ الطَّعَامَ انظُرْ كَيْفَ نُبَيِّنُ لَهُمُ الْآيَاتِ ثُمَّ انظُرْ أَنَّىٰ يُؤْفَكُونَ ٧٥

يُؤْفَكُونَ yu'fakūna · they are deluded

The Messiah, son of Mary, was not but a messenger; [other] messengers have passed on before him. And his mother was a supporter of truth. They both used to eat food. Look how We make clear to them the signs; then look how they are deluded. (Surah Al-Ma'idah, 5:75)

إِنَّ اللَّهَ فَالِقُ الْحَبِّ وَالنَّوَىٰ يُخْرِجُ الْحَيَّ مِنَ الْمَيِّتِ وَمُخْرِجُ الْمَيِّتِ مِنَ الْحَيِّ ذَٰلِكُمُ اللَّهُ فَأَنَّىٰ تُؤْفَكُونَ ٩٥

تُؤْفَكُونَ tu'fakūna · are you deluded

Indeed, Allāh is the cleaver of grain and date seeds. He brings the living out of the dead and brings the dead out of the living. That is Allāh; so how are you deluded? (Surah Al-An'am, 6:95)

إِنَّ الَّذِينَ جَاءُوا بِالْإِفْكِ عُصْبَةٌ مِّنكُمْ لَا تَحْسَبُوهُ شَرًّا لَّكُم بَلْ هُوَ خَيْرٌ لَّكُمْ لِكُلِّ امْرِئٍ مِّنْهُم مَّا اكْتَسَبَ مِنَ الْإِثْمِ وَالَّذِي تَوَلَّىٰ كِبْرَهُ مِنْهُمْ لَهُ عَذَابٌ عَظِيمٌ ١١

بِالْإِفْكِ bil-if'ki · the lie

Indeed, those who came with falsehood are a group among you. Do not think it bad for you; rather, it is good for you. For every person among them is what [punishment] he has earned from the sin, and he who took upon himself the greater portion thereof - for him is a great punishment [i.e., Hellfire]. (Surah An-Nur, 24:11)

أَلَمْ يَأْتِهِمْ نَبَأُ الَّذِينَ مِن قَبْلِهِمْ قَوْمِ نُوحٍ وَعَادٍ وَثَمُودَ وَقَوْمِ إِبْرَاهِيمَ وَأَصْحَابِ مَدْيَنَ وَالْمُؤْتَفِكَاتِ أَتَتْهُمْ رُسُلُهُم بِالْبَيِّنَاتِ فَمَا كَانَ اللَّهُ لِيَظْلِمَهُمْ وَلَٰكِن كَانُوا أَنفُسَهُمْ يَظْلِمُونَ ٧٠

وَالْمُؤْتَفِكَاتِ wal-mu'tafikāti · and the towns overturned

Has there not reached them the news of those before them - the people of Noah and [the tribes of] ʿAad and Thamūd and the people of Abraham and the companions [i.e., dwellers] of Madyan and the towns overturned? Their messengers came to them with clear proofs. And Allāh would never have wronged them, but they were wronging themselves. (Surah At-Tawbah, 9:70)

تَنَزَّلُ عَلَىٰ كُلِّ أَفَّاكٍ أَثِيمٍ ٢٢٢

أَفَّاكٍ affākin · liar

They descend upon every sinful liar. (Surah Ash-Shu'ara, 26:222)