16:106
مَن كَفَرَ بِ ٱللَّهِ مِنۢ بَعْدِ إِيمَٰنِ هِۦٓ إِلَّا مَنْ أُكْرِهَ وَ قَلْبُ هُۥ مُطْمَئِنٌّۢ بِ ٱلْ إِيمَٰنِ وَ لَٰكِن مَّن شَرَحَ بِ ٱلْ كُفْرِ صَدْرًا فَ عَلَيْ هِمْ غَضَبٌ مِّنَ ٱللَّهِ وَ لَ هُمْ عَذَابٌ عَظِيمٌ
Whoever disbelieves in Allah after his belief... except for one who is forced [to renounce his religion] while his heart is secure in faith. But those who [willingly] open their breasts to disbelief, upon them is wrath from Allah, and for them is a great punishment;
20:25
قَالَ رَبِّ ٱشْرَحْ لِ ى صَدْرِ ى
[Moses] said, "My Lord, expand for me my breast [with assurance]
39:22
أَ فَ مَن شَرَحَ ٱللَّهُ صَدْرَ هُۥ لِ لْ إِسْلَٰمِ فَ هُوَ عَلَىٰ نُورٍ مِّن رَّبِّ هِۦ فَ وَيْلٌ لِّ لْ قَٰسِيَةِ قُلُوبُ هُم مِّن ذِكْرِ ٱللَّهِ أُو۟لَٰٓئِكَ فِى ضَلَٰلٍ مُّبِينٍ
So is one whose breast Allah has expanded to [accept] Islam and he is upon a light from his Lord [like one whose heart rejects it]? Then woe to those whose hearts are hardened against the remembrance of Allah. Those are in manifest error.
6:125
فَ مَن يُرِدِ ٱللَّهُ أَن يَهْدِيَ هُۥ يَشْرَحْ صَدْرَ هُۥ لِ لْ إِسْلَٰمِ وَ مَن يُرِدْ أَن يُضِلَّ هُۥ يَجْعَلْ صَدْرَ هُۥ ضَيِّقًا حَرَجًا كَأَنَّ مَا يَصَّعَّدُ فِى ٱل سَّمَآءِ كَ ذَٰلِكَ يَجْعَلُ ٱللَّهُ ٱل رِّجْسَ عَلَى ٱلَّذِينَ لَا يُؤْمِنُ ونَ
So whoever Allah wants to guide - He expands his breast to [contain] Islam; and whoever He wants to misguide - He makes his breast tight and constricted as though he were climbing into the sky. Thus does Allah place defilement upon those who do not believe.
94:1
أَ لَمْ نَشْرَحْ لَ كَ صَدْرَ كَ
Did We not expand for you, [O Muhammad], your breast?