The Holy Quran 4:80 — Surah An-Nisa
Arabic text
مَّن يُطِعِ ٱلرَّسُولَ فَقَدْ أَطَاعَ ٱللَّهَ ۖ وَمَن تَوَلَّىٰ فَمَآ أَرْسَلْنَـٰكَ عَلَيْهِمْ حَفِيظًا
Translation
Whoever obeys the Rasool ﷺ (Muhammad ﷺ) obeys Allaah (because Rasulullaah ﷺ conveys the message of Allaah) and whoever turns away, (refusing to accept the message, then O Muhammad ﷺ, you should not upset yourself because) We have not sent you as a watcher (guard) over them (you will not be questioned for their denial because your responsibility is merely to convey the message to the best of your ability).
Tafsir (excerpt) — Tafsir Usmani
Having established the messengership of the Prophet ﷺ, Almighty Allah now announces this command concerning him: whoever obeys Our Messenger ﷺ is truly obedient to Us, and whoever turns away from him — then We have not sent you, O Messenger ﷺ, as a guardian over these people, to stop them from sinning.
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