وَإِن تُكَذِّبُوا فَقَدْ كَذَّبَ أُمَمٌ مِّن قَبْلِكُمْ وَمَا عَلَى الرَّسُولِ إِلَّا الْبَلَاغُ الْمُبِينُ
[29:18]
And if you reject (the truth), nations before you did indeed reject (the truth); and nothing is incumbent on the messenger but a plain delivering (of the message).
"And if ye reject (the Message), so did generations before you: and the duty of the messenger is only to preach publicly (and clearly)."
But if ye deny, then nations have denied before you. The messenger is only to convey (the message) plainly.