﴿ بَشِيرًۭا وَنَذِيرًۭا فَأَعْرَضَ أَكْثَرُهُمْ فَهُمْ لَا يَسْمَعُونَ ﴾

“to be a herald of glad tidings as well as a warning. And yet, [whenever this divine writ is offered to men,] most of them turn away, so that they cannot hear [its message];”

containing good tidings bashīran is an adjective describing qur’ānan ‘a Qur’ān’ and a warning. But most of them turn away so that they do not hear in a way so as to accept its message.