But if they turn away - then We have not sent you, [O Muḥammad], over them as a guardian; upon you is only [the duty of] notification. And indeed, when We let man taste mercy from Us, he rejoices in it; but if evil afflicts him for what his hands have put forth, then indeed, man is ungrateful.
If they turn away from what you instruct them, then I have not sent you, O Messenger, as a guardian over them to watch their actions. Your duty is only to convey what I have instructed you to convey and their reckoning is left to Allah. When I give man a taste of My mercy of riches, health etc. he rejoices in it. But when a trial of difficulty befalls them on account of their sins, their nature is to be ungrateful for Allah’s favours and become angry at what Allah had in His wisdom decreed.