Allah then says,

﴿فَذَكِّرْ إِن نَّفَعَتِ الذِّكْرَى ﴾

(Therefore remind in case the reminder profits.) meaning, remind where reminding is beneficial. From here we get the etiquette of spreading knowledge, that it should not be wasted upon those who are not suitable or worthy of it. The Commander of the believers, `Ali said, "You do not tell people any statement that their intellects do not grasp except that it will be a Fitnah (trial) for some of them.'' He also said, "Tell people that which they know. Would you like for Allah and His Messenger to be rejected'' Allah said:

﴿سَيَذَّكَّرُ مَن يَخْشَى ﴾

(The reminder will be received by him who fears,) meaning, `he whose heart fears Allah and who knows that he is going to meet Him, will receive admonition from what you convey to him, O Muhammad.'

﴿وَيَتَجَنَّبُهَا الاٌّشْقَى - الَّذِى يَصْلَى النَّارَ الْكُبْرَى - ثُمَّ لاَ يَمُوتُ فِيهَا وَلاَ يَحْيَا ﴾

(But it will be avoided by the wretched, who will enter the great Fire. There he will neither die nor live.) meaning, he will not die and thus be allowed to rest, nor will he live a life that is beneficial to him. Instead, his life will be harmful to him, because it will be the cause of his feeling of the pain of torment and various types of punishments what he is being punished with. Imam Ahmad recorded from Abu Sa`id that the Messenger of Allah said,

«أَمَّا أَهْلُ النَّارِ الَّذِينَ هُمْ أَهْلُهَا لَا يَمُوتُونَ وَلَا يَحْيَوْنَ، وَأَمَّا أُنَاسٌ يُرِيدُ اللهُ بِهِمُ الرَّحْمَةَ فَيُمِيتُهُمْ فِي النَّارِ فَيَدْخُلُ عَلَيْهِمُ الشُّفَعَاءُ فَيَأْخُذُ الرَّجُلُ الضِّبَارَةَ فَيُنْبِتُهُمْ أو قال: يَنْبُتُونَ فِي نَهْرِ الْحَيَا، أو قال: الْحَيَاةِ، أو قال: الْحَيَوَانِ أو قال: نَهْرِ الْجَنَّةِ فَيَنْبُتُونَ نَبَاتَ الْحِبَّةِ فِي حَمِيلِ السَّيْل»

(Concerning the people of the Fire who are deserving of it, they will not die nor will they live. Regarding the people that Allah wants mercy for, He will cause them to die in the Fire. Then He will allow the intercessors to come to them, and a man will take his groups of supporters and plant them (or he said (they will be planted) in the River of Al-Haya (or he said (Al-Hayah, or Al-Hayawan, or Nahr Al-Jannah). Then they will sprout up like the sprouting of the seed on the moist bank of a flowing stream.) Then the Prophet said,

«أَمَا تَرَوْنَ الشَّجَرَةَ تَكُونُ خَضْرَاءَ، ثُمَّ تَكُونُ صَفْرَاءَ، ثُمَّ تَكُونُ خَضْرَاءَ؟»

(Haven't you all seen the tree that is green, then it turns yellow, then it turns green (again)) Abu Sa`id then said that some of those present said, "It is as if the Prophet used to live in the desert wilderness (i.e., due to his parables of nature).'' Ahmad also recorded from Abu Sa`id that the Messenger of Allah said,

«أَمَّا أَهْلُ النَّارِ الَّذِينَ هُمْ أَهْلُهَا فَإِنَّهُمْ لَا يَمُوتُونَ فِيهَا وَلَا يَحْيَوْنَ، وَلَــكِنْ أُنَاسٌ أو كما قال تُصِيبُهُمُ النَّارُ بِذُنُوبِهِمْ أو قال: بِخَطَايَاهُمْ فَيُمِيتُهُمْ إِمَاتَةً حَتْى إِذَا صَارُوا فَحْمًا أُذِنَ فِي الشَّفَاعَةِ، فَجِيءَ بِهِمْ ضَبَائِرَ ضَبَائِرَ فَبُثُّوا عَلى أَنْهَارِ الْجَنَّةِ فَيُقَالُ:يَا أَهْلَ الْجَنَّةِ أَفِيضُوا عَلَيْهِمْ، فَيَنْبُتُونَ نَبَاتَ الْحِبَّةِ تَكُونُ فِي حَمِيلِ السَّيْل»

(Concerning the people of the Fire who will be dwellers of it, they will not die in it nor will they live. However, there will be a group of people - or as he said -( whom the Fire will burn due to their sins - or he said - (their wrongdoings. So, He will cause them to die until they become burnt coal. Then the intercession will be allowed and they will be brought group after group, and they will be scattered over the rivers of Paradise. Then it will be said: "O people of Paradise! Pour down upon them.'' Then they will sprout like the growing of the seed that is upon the moist bank of the flowing stream.'' Then, a man from among the people present said, "It is as if the Messenger of Allah used to live in the desert wilderness.'' Muslim also recorded this Hadith.

﴿قَدْ أَفْلَحَ مَن تَزَكَّى - وَذَكَرَ اسْمَ رَبِّهِ فَصَلَّى - بَلْ تُؤْثِرُونَ الْحَيَوةَ الدُّنْيَا - وَالاٌّخِرَةُ خَيْرٌ وَأَبْقَى - إِنَّ هَـذَا لَفِى الصُّحُفِ الاٍّولَى - صُحُفِ إِبْرَهِيمَ وَمُوسَى ﴾

(14. Indeed whosoever purifies himself shall achieve success.) (15. And remembers the Name of his Lord, and performs Salah.) (16. Rather you prefer the life of this world.) (17. Although the Hereafter is better and more lasting.) (18. Verily, this is in the former Scriptures) (19. The Scriptures of Ibrahim and Musa.)