Surah Al-Ankabut (The Spider), Verse 18

وَاِنْ تُكَذِّبُوْا فَقَدْ كَذَّبَ اُمَمٌ مِّنْ قَبْلِكُمْ وَمَا عَلَی الرَّسُوْلِ اِلَّا الْبَلٰغُ الْمُبِیْنُ ۟

Wa in tukazziboo faqad kazzaba umamum min qablikum wa maa'alar Rasooli illal balaaghul mubeen

“"And if ye reject (the Message), so did generations before you: and the duty of the messenger is only to preach publicly (and clearly)."”

Quran 29:18 (Yusuf Ali Translation)