10:7
إِنَّ ٱلَّذِينَ لَا يَرْجُ ونَ لِقَآءَ نَا وَ رَضُ وا۟ بِ ٱلْ حَيَوٰةِ ٱل دُّنْيَا وَ ٱطْمَأَنُّ وا۟ بِ هَا وَ ٱلَّذِينَ هُمْ عَنْ ءَايَٰتِ نَا غَٰفِلُونَ
Indeed, those who do not expect the meeting with Us and are satisfied with the life of this world and feel secure therein and those who are heedless of Our signs
13:28
ٱلَّذِينَ ءَامَنُ وا۟ وَ تَطْمَئِنُّ قُلُوبُ هُم بِ ذِكْرِ ٱللَّهِ أَلَا بِ ذِكْرِ ٱللَّهِ تَطْمَئِنُّ ٱلْ قُلُوبُ
Those who have believed and whose hearts are assured by the remembrance of Allah. Unquestionably, by the remembrance of Allah hearts are assured."
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;
16:112
وَ ضَرَبَ ٱللَّهُ مَثَلًا قَرْيَةً كَانَتْ ءَامِنَةً مُّطْمَئِنَّةً يَأْتِي هَا رِزْقُ هَا رَغَدًا مِّن كُلِّ مَكَانٍ فَ كَفَرَتْ بِ أَنْعُمِ ٱللَّهِ فَ أَذَٰقَ هَا ٱللَّهُ لِبَاسَ ٱلْ جُوعِ وَ ٱلْ خَوْفِ بِ مَا كَانُ وا۟ يَصْنَعُ ونَ
And Allah presents an example: a city which was safe and secure, its provision coming to it in abundance from every location, but it denied the favors of Allah. So Allah made it taste the envelopment of hunger and fear for what they had been doing.
17:95
قُل لَّوْ كَانَ فِى ٱلْ أَرْضِ مَلَٰٓئِكَةٌ يَمْشُ ونَ مُطْمَئِنِّينَ لَ نَزَّلْ نَا عَلَيْ هِم مِّنَ ٱل سَّمَآءِ مَلَكًا رَّسُولًا
Say, "If there were upon the earth angels walking securely, We would have sent down to them from the heaven an angel [as a] messenger."
22:11
وَ مِنَ ٱل نَّاسِ مَن يَعْبُدُ ٱللَّهَ عَلَىٰ حَرْفٍ فَ إِنْ أَصَابَ هُۥ خَيْرٌ ٱطْمَأَنَّ بِ هِۦ وَ إِنْ أَصَابَتْ هُ فِتْنَةٌ ٱنقَلَبَ عَلَىٰ وَجْهِ هِۦ خَسِرَ ٱل دُّنْيَا وَ ٱلْ ءَاخِرَةَ ذَٰلِكَ هُوَ ٱلْ خُسْرَانُ ٱلْ مُبِينُ
And of the people is he who worships Allah on an edge. If he is touched by good, he is reassured by it; but if he is struck by trial, he turns on his face [to the other direction]. He has lost [this] world and the Hereafter. That is what is the manifest loss.
2:260
وَ إِذْ قَالَ إِبْرَٰهِۦمُ رَبِّ أَرِ نِى كَيْفَ تُحْىِ ٱلْ مَوْتَىٰ قَالَ أَ وَ لَمْ تُؤْمِن قَالَ بَلَىٰ وَ لَٰكِن لِّ يَطْمَئِنَّ قَلْبِ ى قَالَ فَ خُذْ أَرْبَعَةً مِّنَ ٱل طَّيْرِ فَ صُرْ هُنَّ إِلَيْ كَ ثُمَّ ٱجْعَلْ عَلَىٰ كُلِّ جَبَلٍ مِّنْ هُنَّ جُزْءًا ثُمَّ ٱدْعُ هُنَّ يَأْتِي نَ كَ سَعْيًا وَ ٱعْلَمْ أَنَّ ٱللَّهَ عَزِيزٌ حَكِيمٌ
And [mention] when Abraham said, "My Lord, show me how You give life to the dead." [Allah] said, "Have you not believed?" He said, "Yes, but [I ask] only that my heart may be satisfied." [Allah] said, "Take four birds and commit them to yourself. Then [after slaughtering them] put on each hill a portion of them; then call them - they will come [flying] to you in haste. And know that Allah is Exalted in Might and Wise."
3:126
وَ مَا جَعَلَ هُ ٱللَّهُ إِلَّا بُشْرَىٰ لَ كُمْ وَ لِ تَطْمَئِنَّ قُلُوبُ كُم بِ هِۦ وَ مَا ٱل نَّصْرُ إِلَّا مِنْ عِندِ ٱللَّهِ ٱلْ عَزِيزِ ٱلْ حَكِيمِ
And Allah made it not except as [a sign of] good tidings for you and to reassure your hearts thereby. And victory is not except from Allah, the Exalted in Might, the Wise -
4:103
فَ إِذَا قَضَيْ تُمُ ٱل صَّلَوٰةَ فَ ٱذْكُرُ وا۟ ٱللَّهَ قِيَٰمًا وَ قُعُودًا وَ عَلَىٰ جُنُوبِ كُمْ فَ إِذَا ٱطْمَأْنَن تُمْ فَ أَقِيمُ وا۟ ٱل صَّلَوٰةَ إِنَّ ٱل صَّلَوٰةَ كَانَتْ عَلَى ٱلْ مُؤْمِنِينَ كِتَٰبًا مَّوْقُوتًا
And when you have completed the prayer, remember Allah standing, sitting, or [lying] on your sides. But when you become secure, re-establish [regular] prayer. Indeed, prayer has been decreed upon the believers a decree of specified times.
5:113
قَالُ وا۟ نُرِيدُ أَن نَّأْكُلَ مِنْ هَا وَ تَطْمَئِنَّ قُلُوبُ نَا وَ نَعْلَمَ أَن قَدْ صَدَقْ تَ نَا وَ نَكُونَ عَلَيْ هَا مِنَ ٱل شَّٰهِدِينَ
They said, "We wish to eat from it and let our hearts be reassured and know that you have been truthful to us and be among its witnesses."
89:27
يَٰٓ أَيَّتُهَا ٱل نَّفْسُ ٱلْ مُطْمَئِنَّةُ
[To the righteous it will be said], "O reassured soul,
8:10
وَ مَا جَعَلَ هُ ٱللَّهُ إِلَّا بُشْرَىٰ وَ لِ تَطْمَئِنَّ بِ هِۦ قُلُوبُ كُمْ وَ مَا ٱل نَّصْرُ إِلَّا مِنْ عِندِ ٱللَّهِ إِنَّ ٱللَّهَ عَزِيزٌ حَكِيمٌ
And Allah made it not but good tidings and so that your hearts would be assured thereby. And victory is not but from Allah. Indeed, Allah is Exalted in Might and Wise.