Efficacy of Admonition

وَذَكِّرْ فَإِنَّ ٱلذِّكْرَىٰ تَنفَعُ ٱلْمُؤْمِنِينَ

And remind, for indeed, the reminder benefits the believers.

فَذَكِّرْ إِن نَّفَعَتِ ٱلذِّكْرَىٰ

So remind, if the reminder should benefit;