وَالَّذِينَ يَقُولُونَ رَبَّنَا هَبْ لَنَا مِنْ أَزْوَاجِنَا وَذُرِّيَّاتِنَا قُرَّةَ أَعْيُنٍ وَاجْعَلْنَا لِلْمُتَّقِينَ إِمَامًا
Our Lord, grant us from our spouses and lineage coolness of eyes and make us leaders over those who are cautious/ fearful of Allah / conscious / pious.
In order to understand his favourite duaa, he explains the Arabic figure of speech : قرة أعين
qurata a3yun = coolness of eyes by giving examples from ancient Arabic stories and Quran stories.