{So remind}—that is, with the Quran—{if the reminder should benefit}—that is, only those who will accept the reminder will benefit from it.
﴿فَذكر﴾ أَيْ: بِالْقُرْآنِ ﴿إِنْ نَفَعَتِ الذِّكْرَى﴾ أَيْ: إِنَّمَا يَنْتَفِعُ بِالتَّذْكِرَةِ مَنْ يقبلهَا