شَرَحَ

أَلَمْ نَشْرَحْ لَكَ صَدْرَكَ

Did We not expand for you, [O Muḥammad], your breast?

قَالَ رَبِّ ٱشْرَحْ لِى صَدْرِى

[Moses] said, "My Lord, expand [i.e., relax] for me my breast [with assurance]

أَفَمَن شَرَحَ ٱللَّهُ صَدْرَهُۥ لِلْإِسْلَـٰمِ فَهُوَ عَلَىٰ نُورٍۢ مِّن رَّبِّهِۦ ۚ فَوَيْلٌۭ لِّلْقَـٰسِيَةِ قُلُوبُهُم مِّن ذِكْرِ ٱللَّهِ ۚ أُو۟لَـٰٓئِكَ فِى ضَلَـٰلٍۢ مُّبِينٍ

So is one whose breast Allāh has expanded to [accept] Islām and he is upon [i.e., guided by] a light from his Lord [like one whose heart rejects it]? Then woe to those whose hearts are hardened against the remembrance of Allāh. Those are in manifest error.