Al-A'laa • BN-TAFSEER-IBN-E-KASEER
﴿ فَذَكِّرْ إِن نَّفَعَتِ ٱلذِّكْرَىٰ ﴾
“REMIND, THEN, [others of the truth, regardless of] whether this reminding [would seem to] be of use [or not]:”
Please check ayah 87:13 for complete tafsir.