Light as a Symbol of Righteous Deeds

يَوْمَ تَرَى ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَـٰتِ يَسْعَىٰ نُورُهُم بَيْنَ أَيْدِيهِمْ وَبِأَيْمَـٰنِهِم بُشْرَىٰكُمُ ٱلْيَوْمَ جَنَّـٰتٌ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَـٰرُ خَـٰلِدِينَ فِيهَا ۚ ذَٰلِكَ هُوَ ٱلْفَوْزُ ٱلْعَظِيمُ

On the Day you see the believing men and believing women, their light proceeding before them and on their right, [it will be said], "Your good tidings today are [of] gardens beneath which rivers flow, wherein you will abide eternally." That is what is the great attainment.