[Moses] said: "My Lord, expand for me my chest [with assurance]," praying that He expand his chest for faith.
﴿قَالَ﴾ مُوسَى ﴿رَبِّ اشْرَحْ لِي صَدْرِي﴾ دَعَا أَنْ يَشْرَحَ صَدْرَهُ لِلْإِيمَانِ.