Surah Al-'Ankabut, Verse 18

وَإِن تُكَذِّبُواْ فَقَدۡ كَذَّبَ أُمَمٞ مِّن قَبۡلِكُمۡۖ وَمَا عَلَى ٱلرَّسُولِ إِلَّا ٱلۡبَلَٰغُ ٱلۡمُبِينُ١٨

wa-in tukadhibū faqad kadhaba umamun min qablikum wamā ʿalā l-rasūli illā l-balāghu l-mubīnu

And if you [people] deny [the message] - already nations before you have denied. And there is not upon the Messenger except [the duty of] clear notification.