Surah 'Abasa 80:4

أَوْ يَذَّكَّرُ فَتَنفَعَهُ ٱلذِّكْرَىٰٓ

Or be reminded and the remembrance would benefit him?

Translation: Saheeh International

Tafsir

or be admonished yadhdhakkar the original tā’ of yatadhakkar has been assimilated with the dhāl and so the reminder the admonition heard from you might benefit him a variant reading for tanfa‘uhu has tanfa‘ahu as the response to the optative statement.

Excerpt from Tafsir al-Jalalayn, commentary on 80:4, via Quran.com. The reader has the full commentary and 9 more tafsirs.