﴿ مَن جَآءَ بِٱلْحَسَنَةِ فَلَهُۥ خَيْرٌۭ مِّنْهَا وَهُم مِّن فَزَعٍۢ يَوْمَئِذٍ ءَامِنُونَ ﴾

“Whoever shall come [before Him] with a good deed will gain [further] good there from; and they will be secure from the terror of that Day.”

Whoever brings a good deed namely the profession of ‘there is no god but God’ on the Day of Resurrection shall have good shall have a reward for it because of it this khayrun is not the comparative ‘better’ since there is no deed better than a good deed. In another verse it is stated that he shall have tenfold the like of it Q. 6160; and they namely those who bring such good deeds shall be secure from the terror of that day min faza‘i yawmi’idhin if read as a genitive annexation; or min faza‘in yawma’idhin ‘from terror on that day’.