فَذَكِّرْ إِنَّمَآ أَنتَ مُذَكِّرٌ
English Translation
So remind, [O Muhammad]; you are only a reminder.
English Transliteration
Fathakkir innama anta muthakkirun
Tafsir of Verse 21
Then remind them! Thou art only a reminder;
Therefore do thou give admonition, for thou art one to admonish.