The Prophet ﷺ said: Knowledge has three categories; anything else is extra; a precise verse, or an established sunnah (practice), or a firm obligatory duty. (Using translation from Abū Dāʾūd 2885)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ الْعِلْمُ ثَلَاثَةٌ وَمَا سِوَى ذَلِكَ فَهُوَ فَضْلٌ آيَةٌ مُحْكَمَةٌ أَوْ سُنَّةٌ قَائِمَةٌ أَوْ فَرِيضَةٌ عَادِلَةٌ  

[Machine] The Messenger of Allah ﷺ said: "Learn the Quran and teach it to people, and learn knowledge and teach it to people, and learn the religious obligations and teach them to people. Verily, knowledge will vanish and trials and tribulations will appear, until two people differ in a religious obligation and find no one to resolve their dispute. It has been narrated by Awf, from Sulaiman, from Abu al-Ahwas, from Abdullah, that Abu al-Hasan al-Muqri' informed us that al-Hasan ibn Muhammad ibn Ishaq narrated to us, that Yusuf ibn Ya'qub narrated to us, that Muhammad ibn Abi Bakr narrated to us, that al-Muthanna ibn Bakr al-Attar narrated to us, that Awf narrated to us from Sulaiman, from Abu al-Ahwas, from Abdullah. He mentioned this hadith as a marfu' report, except that he said: 'Verily, I am a man who will be taken away (i.e., die), and indeed knowledge will be taken away, until two men differ concerning a religious obligation and find no one to inform them about it.'"  

قَالَ رَسُولُ اللهِ ﷺ تَعَلَّمُوا الْقُرْآنَ وَعَلِّمُوهُ النَّاسَ وَتَعَلَّمُوا الْعِلْمَ وَعَلِّمُوهُ النَّاسَ وَتَعَلَّمُوا الْفَرَائِضَ وَعَلِّمُوهُ النَّاسَ؛ فَإِنَّ الْعِلْمَ سَيَنْقَضِي وَتَظْهَرُ الْفِتَنُ حَتَّى يَخْتَلِفَ الِاثَنَانِ فِي الْفَرِيضَةِ فَلَا يَجِدَانِ مَنْ يَفْصِلُ بَيْنَهُمَا وَقَدْ قِيلَ عَنْ عَوْفٍ عَنْ سُلَيْمَانَ عَنْ أَبِي الْأَحْوَصِ عَنْ عَبْدِ اللهِ 12174 أَخْبَرَنَاهُ أَبُو الْحَسَنِ الْمُقْرِئُ أنبأ الْحَسَنُ بْنُ مُحَمَّدِ بْنِ إِسْحَاقَ ثنا يُوسُفُ بْنُ يَعْقُوبَ ثنا مُحَمَّدُ بْنُ أَبِي بَكْرٍ ثنا الْمُثَنَّى بْنُ بَكْرٍ الْعَطَّارُ ثنا عَوْفٌ عَنْ سُلَيْمَانَ عَنْ أَبِي الْأَحْوَصِ عَنْ عَبْدِ اللهِ فَذَكَرَهُ مَرْفُوعًا إِلَّا أَنَّهُ قَالَ فَإِنِّي امْرُؤٌ مَقْبُوضٌ وَإِنَّ الْعِلْمَ سَيُقْبَضُ حَتَّى يَخْتَلِفَ الرَّجُلَانِ فِي الْفَرِيضَةِ فَلَا يَجِدَانِ مَنْ يُخْبُرُهُمَا بِهَا  

[Machine] "The Prophet ﷺ said: Learn the obligatory acts and teach them to others, for they are half of knowledge and they are forgotten. They are the first things to be taken away from my nation. Hafs ibn Umar excelled in memorizing them, although he was not the strongest (person)."  

أَنَّ النَّبِيَّ ﷺ قَالَ تَعَلَّمُوا الْفَرَائِضَ وَعَلِّمُوهُ النَّاسَ؛ فَإِنَّهُ نِصْفُ الْعِلْمِ وَهُوَ يُنْسَى وَهُوَ أَوَّلُ شَيْءٍ يُنْتَزَعُ مِنَ أُمَّتِي تَفَرَّدَ بِهِ حَفْصُ بْنُ عُمَرَ وَلَيْسَ بِالْقَوِيِّ  

[Machine] Umar said, "Learn the obligatory duties, the melody, and the practices as you learn the Quran."  

قَالَ عُمَرُ تَعَلَّمُوا الْفَرَائِضَ وَاللَّحْنَ وَالسُّنَّةَ كَمَا تَعَلَّمُونَ الْقُرْآنَ  

[Machine] Umar said, "Learn the obligations, as they are part of your religion."  

قَالَ عُمَرُ ؓ تَعَلَّمُوا الْفَرَائِضَ؛ فَإِنَّهَا مِنْ دِينِكُمْ  

[Machine] Omar wrote: "If you indulge in pastimes, indulge in archery, and if you speak, speak about religious obligations."  

كَتَبَ عُمَرُ إِذَا لَهَوْتُمْ فَالْهُوا بِالرَّمْيِ وَإِذَا تَحَدَّثْتُمْ فَتَحَدَّثُوا بِالْفَرَائِضِ  

[Machine] Whoever learns the Quran, let him learn the obligations and not be like a Bedouin man who met him and said, "O Abdullah, are you a Bedouin or a Muhajir?" If he says Muhajir, he says, "A person from my family died, so how do we distribute his inheritance?" If he knows, then he is better off, Allah will give it to him. And if he says, "I don't know," he says, "What is your superiority over us when you read the Quran and do not know the obligations?"  

مَنْ تَعَلَّمَ الْقُرْآنَ فَلْيَتَعَلَّمِ الْفَرَائِضَ وَلَا يَكُنْ كَرَجُلٍ لَقِيَهُ أَعْرَابِيٌّ فَقَالَ لَهُ يَا عَبْدَ اللهِ أَعْرَابِيٌّ أَمْ مُهَاجِرٌ؟ فَإِنْ قَالَ مُهَاجِرٌ قَالَ إِنْسَانٌ مِنَ أَهْلِي مَاتَ فَكَيْفَ نُقَسِّمُ مِيرَاثَهُ فَإِنْ عَلِمَ كَانَ خَيْرًا أَعْطَاهُ اللهُ إِيَّاهُ وَإِنْ قَالَ لَا أَدْرِي قَالَ فَمَا فَضْلُكُمْ عَلَيْنَا إِنَّكُمْ تَقْرَءُونَ الْقُرْآنَ وَلَا تَعْلَمُونَ الْفَرَائِضَ؟  

[Machine] Abdullah said, "Whoever learns the Quran should also learn the obligatory acts of worship. For if he meets a Bedouin and the Bedouin asks him, 'Do you recite the Quran?' and he answers, 'Yes,' then the Bedouin asks him, 'Do you fulfill its obligations?' and he answers, 'Yes,' then the Bedouin says, 'What is your superiority over me?'"  

قَالَ عَبْدُ اللهِ مَنْ تَعَلَّمَ الْقُرْآنَ فَلْيَتَعَلَّمِ الْفَرَائِضَ؛ فَإِنْ لَقِيَهُ أَعْرَابِيٌّ قَالَ يَا مُهَاجِرُ أَتَقْرَأُ الْقُرْآنَ؟ قَالَ نَعَمْ قَالَ وَأَنَا أَقْرَأُ الْقُرْآنَ فَإِنْ قَالَ تُفْرِضُ؟ قَالَ نَعَمْ كَانَ ذَلِكَ وَإِنْ قَالَ لَا قَالَ فَمَا فَضْلُكَ عَلَيَّ؟  

[Machine] Whoever reads the Quran should learn the obligatory acts and should not be like a bedouin man who says, "O emigrant, do you read the Quran?". If he says, "Yes", he should ask, "If someone from my family dies, should I fulfill their obligation?". If he tells him, it is knowledge that he has been taught and an increase that Allah has given him. Otherwise, he should say, "Why do you consider yourselves better than us, O emigrants?"  

مَنْ قَرَأَ الْقُرْآنَ فَلْيَتَعَلَّمِ الْفَرَائِضَ وَلَا يَكُنْ كَرَجُلٍ لَقِيَهُ أَعْرَابِيٌّ فَيَقُولُ يَا مُهَاجِرُ أَتَقْرَأُ الْقُرْآنَ؟ فَإِنْ قَالَ نَعَمْ قَالَ فَإِنَّ إِنْسَانًا مِنْ أَهْلِي مَاتَ فَتَقُصُّ فَرِيضَتَهُ؟ فَإِنْ حَدَّثَهُ فَهُوَ عِلْمٌ عُلِّمَهُ وَزِيَادَةٌ زَادَهُ اللهُ وَإِلَّا قَالَ فَبِمَا تَفْضُلُونَنَا يَا مَعْشَرَ الْمُهَاجِرِينَ؟  

[Machine] Ibn Mas'ud said: "Learn the obligations, pilgrimage, and divorce, for it is part of your religion."  

قَالَ ابْنُ مَسْعُودٍ تَعَلَّمُوا الْفَرَائِضَ وَالْحَجَّ وَالطَّلَاقَ؛ فَإِنَّهُ مِنْ دِينِكُمْ  

[Machine] Ibn Abbas used to place the cable on my leg to teach me the Quran and the obligations.  

كَانَ ابْنُ عَبَّاسٍ يَضَعُ الْكَبْلَ فِي رِجْلِيَّ يُعَلِّمُنِي الْقُرْآنَ وَالْفَرَائِضَ  

[Machine] From Tawus and Qatadah: "Al-faridah (obligatory duty) is one-third of knowledge."  

عَنْ طَاوُسٍ وَقَتَادَةَ الْفَرِيضَةُ ثُلُثُ الْعِلْمِ  

[Machine] To learn it so that you can teach your neighbors and pass it on from one another.  

أَنْ تَعْلَمَهَا فَأَمِتْ جِيرَانَكَ وَوَرِّثَ بَعْضَهُمْ مِنْ بَعْضٍ