٥٣. وَقُل لِّعِبَادِى يَقُولُوا۟ ٱلَّتِى هِىَ أَحْسَنُ ۚ إِنَّ ٱلشَّيْطَـٰنَ يَنزَغُ بَيْنَهُمْ ۚ إِنَّ ٱلشَّيْطَـٰنَ كَانَ لِلْإِنسَـٰنِ عَدُوًّا مُّبِينًا
٥٤. رَّبُّكُمْ أَعْلَمُ بِكُمْ ۖ إِن يَشَأْ يَرْحَمْكُمْ أَوْ إِن يَشَأْ يُعَذِّبْكُمْ ۚ وَمَآ أَرْسَلْنَـٰكَ عَلَيْهِمْ وَكِيلًا
[53-54] And O Muhammad!, say to My servants,57 "They should utter only that which is the best of all.58 In reality, it is Satan who tries to sow discord between human beings. The fact is that Satan is the avowed enemy of man.59 Your Lord is fully aware of everything concerning you. If He will, He may show mercy to you, and if He will, He may give you severe chastisement."60 And, O Prophet, We have not sent you to be the guardian over people.61
57"The believers."
58The believers have been enjoined to say only the best things even in their discussion with the disbelievers and other opponents of their Faith. They should neither use harsh words nor make exaggerated statements. They should be cool in their conversation and say only what is true and dignified in spite of the provoking behavior of the opponents.
59The believers have been forewarned to guard against the provocations of Satan, as if to say, "While answering your opponents, if you feel that you are being aroused to anger, you should at once understand that it is Satan who is exciting you in order to do harm to your dispute, in which he wants to engage human beings for sowing discord between them."
60This is to warn the believers to refrain from making claims of piety so as to assign Paradise to themselves and Hell to their opponents. It is Allah alone Who has the power to decide these things because He is fully aware of the known and secret and the present and future things about all human beings. It is He Who will decide whether to show mercy to anyone or give chastisement. However, a man may say in the light of the Divine Book that a certain kind of human beings deserve mercy and another kind of people incur chastisement but none has any right to say specifically that a particular man will be given chastisement and another will get salvation.
61This is to declare that a Prophet is sent to convey the Message and not to decide whether a person will receive mercy or get chastisement. It does not, however, mean that, God forbid, the Holy Prophet himself did such a thing and Allah had to warn him. In fact, this is to warn the Muslims that when the Prophet himself is not in a position as to decide the fates of the people, they should never think of such a thing as to assign Paradise and Hell to anyone.