﴿ فَإِنْ أَعْرَضُوا۟ فَمَآ أَرْسَلْنَٰكَ عَلَيْهِمْ حَفِيظًا ۖ إِنْ عَلَيْكَ إِلَّا ٱلْبَلَٰغُ ۗ وَإِنَّآ إِذَآ أَذَقْنَا ٱلْإِنسَٰنَ مِنَّا رَحْمَةًۭ فَرِحَ بِهَا ۖ وَإِن تُصِبْهُمْ سَيِّئَةٌۢ بِمَا قَدَّمَتْ أَيْدِيهِمْ فَإِنَّ ٱلْإِنسَٰنَ كَفُورٌۭ ﴾

“BUT IF they turn away [from thee, O Prophet, know that] We have not sent thee to be their keeper: thou art not bound to do more than deliver the message [entrusted to thee]. And, behold, [such as turn away from Our mes­sages are but impelled by the weakness and incon­stancy of human nature: thus,] when We give man a taste of Our grace, he is prone to exult in it; but if misfortune befalls [any of] them in result of what their own hands have sent forth, then, behold, man shows how bereft he is of all gratitude!”

But if they are disregardful of answering God We have not sent you as a keeper over them to keep track of their deeds by securing what is demanded of them. Your duty is only to deliver the Message — this was revealed before the command to struggle against them. And indeed when We let man taste from Us some mercy some grace such as wealth and good health he exults in it; but if some ill some calamity befalls them the pronoun here refers to ‘man’ on the basis of the plural import of the generic noun because of what their own hands have sent ahead because of what they have offered of deeds — the expression refers to ‘the hands’ because most actions are effected by them then lo! man is ungrateful for the grace.