The Quran root ف ق ه f-q-h

أَيْنَمَا تَكُونُوا يُدْرِككُّمُ الْمَوْتُ وَلَوْ كُنتُمْ فِي بُرُوجٍ مُّشَيَّدَةٍ وَإِن تُصِبْهُمْ حَسَنَةٌ يَقُولُوا هَٰذِهِ مِنْ عِندِ اللَّهِ وَإِن تُصِبْهُمْ سَيِّئَةٌ يَقُولُوا هَٰذِهِ مِنْ عِندِكَ قُلْ كُلٌّ مِّنْ عِندِ اللَّهِ فَمَالِ هَٰؤُلَاءِ الْقَوْمِ لَا يَكَادُونَ يَفْقَهُونَ حَدِيثًا ٧٨

يَفْقَهُونَ yafqahūna · (to) understand

Wherever you may be, death will overtake you, even if you should be within towers of lofty construction. But if good comes to them, they say, "This is from Allāh"; and if evil befalls them, they say, "This is from you." Say, "All [things] are from Allāh." So what is [the matter] with those people that they can hardly understand any statement? (Surah An-Nisa, 4:78)

وَمِنْهُم مَّن يَسْتَمِعُ إِلَيْكَ وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِي آذَانِهِمْ وَقْرًا وَإِن يَرَوْا كُلَّ آيَةٍ لَّا يُؤْمِنُوا بِهَا حَتَّىٰ إِذَا جَاءُوكَ يُجَادِلُونَكَ يَقُولُ الَّذِينَ كَفَرُوا إِنْ هَٰذَا إِلَّا أَسَاطِيرُ الْأَوَّلِينَ ٢٥

يَفْقَهُوهُ yafqahūhu · they understand it

And among them are those who listen to you, but We have placed over their hearts coverings, lest they understand it, and in their ears deafness. And if they should see every sign, they will not believe in it. Even when they come to you arguing with you, those who disbelieve say, "This is not but legends of the former peoples." (Surah Al-An'am, 6:25)

وَمَا كَانَ الْمُؤْمِنُونَ لِيَنفِرُوا كَافَّةً فَلَوْلَا نَفَرَ مِن كُلِّ فِرْقَةٍ مِّنْهُمْ طَائِفَةٌ لِّيَتَفَقَّهُوا فِي الدِّينِ وَلِيُنذِرُوا قَوْمَهُمْ إِذَا رَجَعُوا إِلَيْهِمْ لَعَلَّهُمْ يَحْذَرُونَ ١٢٢

لِّيَتَفَقَّهُوا liyatafaqqahū · that they may obtain understanding

And it is not for the believers to go forth [to battle] all at once. For there should separate from every division of them a group [remaining] to obtain understanding in the religion and warn [i.e., advise] their people when they return to them that they might be cautious. (Surah At-Tawbah, 9:122)