Surah Al-'Ankabut, ayah 18

29:18

وَإِن تُكَذِّبُواْ فَقَدۡ كَذَّبَ أُمَمٞ مِّن قَبۡلِكُمۡۖ وَمَا عَلَى ٱلرَّسُولِ إِلَّا ٱلۡبَلَٰغُ ٱلۡمُبِينُ ١٨

Wa in tukaddhibū faqad kaddhaba umamum min qablikum wamā 'alar-rasūli illal-balāghul-mubīn

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.1129

Footnotes

1129 Commentators have differed over this verse - whether it is a continuation of the words of Prophet Abraham or words of comfort given by Allāh to Prophet Muḥammad (ﷺ), which according to context seems more likely.