51:55
وَذَكِّرْ فَإِنَّ ٱلذِّكْرَىٰ تَنفَعُ ٱلْمُؤْمِنِينَ
wadhakkir fa-inna l-dhik'rā tanfaʿu l-mu'minīna
and go on reminding [people], it is good for those who believe to be reminded.
And remind (by preaching the Qur’ân, O Muhammad صلى الله عليه وسلم), for verily, the reminding profits the believers.