I asked my father, "Was the Verse:-- 'Say: (O Muhammad) Shall We tell you the greatest losers in respect of their deeds?'(18.103) revealed regarding Al-Haruriyya?" He said, "No, but regarding the Jews and the Christians, for the Jews disbelieved Muhammad and the Christians disbelieved in Paradise and say that there are neither meals nor drinks therein. Al- Hururiyya are those people who break their pledge to Allah after they have confirmed that they will fulfill it, and Saʿd used to call them 'Al-Fasiqin (evildoers who forsake Allah's obedience).  

سَأَلْتُ أَبِي {قُلْ هَلْ نُنَبِّئُكُمْ بِالأَخْسَرِينَ أَعْمَالاً} هُمُ الْحَرُورِيَّةُ قَالَ لاَ هُمُ الْيَهُودُ وَالنَّصَارَى أَمَّا الْيَهُودُ فَكَذَّبُوا مُحَمَّدًا ﷺ وَأَمَّا النَّصَارَى كَفَرُوا بِالْجَنَّةِ وَقَالُوا لاَ طَعَامَ فِيهَا وَلاَ شَرَابَ وَالْحَرُورِيَّةُ الَّذِينَ يَنْقُضُونَ عَهْدَ اللَّهِ مِنْ بَعْدِ مِيثَاقِهِ وَكَانَ سَعْدٌ يُسَمِّيهِمُ الْفَاسِقِينَ  

[Machine] I used to read to my father until I reached this verse: "Say, shall we inform you who will be the greatest losers in their deeds?" [Surah Al-Kahf: 103]. I said, "O my father, are they the Khawarij?" He replied, "No, my son, read the verse that comes after it: 'Those are the ones who disbelieve in the verses of their Lord and in their meeting Him, so their deeds have become worthless, and We will not assign to them on the Day of Resurrection any importance.'" [Surah Al-Kahf: 105]. He said, "They are the Christians who exert themselves to disbelieve in the signs of their Lord with Muhammad and to deny his meeting." And they said, "There is no food in Paradise, nor drink, but the Khawarij are the transgressors who break the covenant of Allah after its binding and cut off what Allah has commanded to be joined, and they cause corruption on the earth. Those are the losers."  

كُنْتُ أَقْرَأُ عَلَى أَبِي حَتَّى إِذَا بَلَغْتُ هَذِهِ الْآيَةَ {قُلْ هَلْ نُنَبِّئُكُمْ بِالْأَخْسَرِينَ أَعْمَالًا} [الكهف 103] الْآيَةُ قُلْتُ يَا أَبَتَاهُ أَهُمُ الْخَوَارِجُ؟ قَالَ لَا يَا بُنَيَّ اقْرَأِ الْآيَةَ الَّتِي بَعْدَهَا {أُولَئِكَ الَّذِينَ كَفَرُوا بِآيَاتِ رَبِّهِمْ وَلِقَائِهِ فَحَبِطَتْ أَعْمَالُهُمْ فَلَا نُقِيمُ لَهُمْ يَوْمَ الْقِيَامَةِ وَزْنًا} [الكهف 105] قَالَ «هُمُ الْمُجْتَهِدُونَ مِنَ النَّصَارَى كَانَ كُفْرُهُمْ بِآيَاتِ رَبِّهِمْ بِمُحَمَّدٍ وَلِقَائِهِ» وَقَالُوا لَيْسَ فِي الْجَنَّةِ طَعَامٌ وَلَا شَرَابٌ وَلَكِنَّ الْخَوَارِجَ هُمُ الْفَاسِقُونَ الَّذِينَ يَنْقُضُونَ عَهْدَ اللَّهِ مِنْ بَعْدِ مِيثَاقِهِ وَيَقْطَعُونَ مَا أَمَرَ اللَّهُ بِهِ أَنْ يُوصَلَ وَيُفْسِدُونَ فِي الْأَرْضِ أُولَئِكَ هُمُ الْخَاسِرُونَ  

[Machine] About this verse "Say, shall we inform you of the greatest losers in their deeds?" [Surah Al-Kahf 103], are they the haruriyya (a sect)? He said, no, they are the People of the Book. As for the Jews, they disbelieved in Muhammad ﷺ , and the Christians disbelieved in Paradise. They said, it does not contain food or drink, but rather the haruriyya, who Allah ﷻ said, "And they prevent what Allah has ordered to be sustained and they corrupt on the earth." [Surah Al-Baqarah 27], they are the corrupt ones, he said, "Thus I have memorized it, Saad used to call them the corrupt ones."  

عَنْ هَذِهِ الْآيَةِ {قُلْ هَلْ نُنَبِّئُكُمْ بِالْأَخْسَرِينَ أَعْمَالًا} [الكهف 103] أَهُمُ الْحَرُورِيَّةُ؟ قَالَ لَا هُمْ أَهْلُ الْكِتَابِ أَمَّا الْيَهُودُ فَكَفَرُوا بِمُحَمَّدٍ ﷺ وَأَمَّا النَّصَارَى فَكَفَرُوا بِالْجَنَّةِ قَالُوا لَيْسَ فِيهَا طَعَامٌ وَلَا شَرَابٌ وَلَكِنَّ الْحَرُورِيَّةَ الَّذِينَ قَالَ اللهُ ﷻ {وَيَقْطَعُونَ مَا أَمَرَ اللهُ بِهِ أَنْ يُوَصَلَ وَيُفْسِدُونَ فِي الْأَرْضِ} [البقرة 27] إِلَى الْفَاسِقِينَ قَالَ يَزِيدُ هَكَذَا حَفِظْتُ كَانَ سَعْدٌ يُسَمِّيهِمُ الْفَاسِقِينَ