The root س ن ن (s-n-n) in the Quran

قَدْ خَلَتْ مِن قَبْلِكُمْ سُنَنٌ فَسِيرُوا۟ فِى ٱلْأَرْضِ فَٱنظُرُوا۟ كَيْفَ كَانَ عَٰقِبَةُ ٱلْمُكَذِّبِينَ ۝١٣٧

Similar situations [as yours] have passed on before you, so proceed throughout the earth and observe how was the end of those who denied.

يُرِيدُ ٱللَّهُ لِيُبَيِّنَ لَكُمْ وَيَهْدِيَكُمْ سُنَنَ ٱلَّذِينَ مِن قَبْلِكُمْ وَيَتُوبَ عَلَيْكُمْ وَٱللَّهُ عَلِيمٌ حَكِيمٌ ۝٢٦

Allāh wants to make clear to you [the lawful from the unlawful] and guide you to the [good] practices of those before you and to accept your repentance. And Allāh is Knowing and Wise.

وَكَتَبْنَا عَلَيْهِمْ فِيهَآ أَنَّ ٱلنَّفْسَ بِٱلنَّفْسِ وَٱلْعَيْنَ بِٱلْعَيْنِ وَٱلْأَنفَ بِٱلْأَنفِ وَٱلْأُذُنَ بِٱلْأُذُنِ وَٱلسِّنَّ بِٱلسِّنِّ وَٱلْجُرُوحَ قِصَاصٌ فَمَن تَصَدَّقَ بِهِۦ فَهُوَ كَفَّارَةٌ لَّهُۥ وَمَن لَّمْ يَحْكُم بِمَآ أَنزَلَ ٱللَّهُ فَأُو۟لَٰٓئِكَ هُمُ ٱلظَّٰلِمُونَ ۝٤٥

And We ordained for them therein a life for a life, an eye for an eye, a nose for a nose, an ear for an ear, a tooth for a tooth, and for wounds is legal retribution. But whoever gives [up his right as] charity, it is an expiation for him. And whoever does not judge by what Allāh has revealed - then it is those who are the wrongdoers [i.e., the unjust].

قُل لِّلَّذِينَ كَفَرُوٓا۟ إِن يَنتَهُوا۟ يُغْفَرْ لَهُم مَّا قَدْ سَلَفَ وَإِن يَعُودُوا۟ فَقَدْ مَضَتْ سُنَّتُ ٱلْأَوَّلِينَ ۝٣٨

Say to those who have disbelieved [that] if they cease, what has previously occurred will be forgiven for them. But if they return [to hostility] - then the precedent of the former [rebellious] peoples has already taken place.

لَا يُؤْمِنُونَ بِهِۦ وَقَدْ خَلَتْ سُنَّةُ ٱلْأَوَّلِينَ ۝١٣

They will not believe in it, while there has already occurred the precedent of the former peoples.

وَلَقَدْ خَلَقْنَا ٱلْإِنسَٰنَ مِن صَلْصَٰلٍ مِّنْ حَمَإٍ مَّسْنُونٍ ۝٢٦

And We did certainly create man out of clay from an altered black mud.

وَإِذْ قَالَ رَبُّكَ لِلْمَلَٰٓئِكَةِ إِنِّى خَٰلِقٌۢ بَشَرًا مِّن صَلْصَٰلٍ مِّنْ حَمَإٍ مَّسْنُونٍ ۝٢٨

And [mention, O Muḥammad], when your Lord said to the angels, "I will create a human being out of clay from an altered black mud.

قَالَ لَمْ أَكُن لِّأَسْجُدَ لِبَشَرٍ خَلَقْتَهُۥ مِن صَلْصَٰلٍ مِّنْ حَمَإٍ مَّسْنُونٍ ۝٣٣

He said, "Never would I prostrate to a human whom You created out of clay from an altered black mud."

سُنَّةَ مَن قَدْ أَرْسَلْنَا قَبْلَكَ مِن رُّسُلِنَا وَلَا تَجِدُ لِسُنَّتِنَا تَحْوِيلًا ۝٧٧

[That is Our] established way for those We had sent before you of Our messengers; and you will not find in Our way any alteration.

وَمَا مَنَعَ ٱلنَّاسَ أَن يُؤْمِنُوٓا۟ إِذْ جَآءَهُمُ ٱلْهُدَىٰ وَيَسْتَغْفِرُوا۟ رَبَّهُمْ إِلَّآ أَن تَأْتِيَهُمْ سُنَّةُ ٱلْأَوَّلِينَ أَوْ يَأْتِيَهُمُ ٱلْعَذَابُ قُبُلًا ۝٥٥

And nothing has prevented the people from believing when guidance came to them and from asking forgiveness of their Lord except that there [must] befall them the [accustomed] precedent of the former peoples or that the punishment should come [directly] before them.

مَّا كَانَ عَلَى ٱلنَّبِىِّ مِنْ حَرَجٍ فِيمَا فَرَضَ ٱللَّهُ لَهُۥ سُنَّةَ ٱللَّهِ فِى ٱلَّذِينَ خَلَوْا۟ مِن قَبْلُ وَكَانَ أَمْرُ ٱللَّهِ قَدَرًا مَّقْدُورًا ۝٣٨

There is not to be upon the Prophet any discomfort concerning that which Allāh has imposed upon him. [This is] the established way of Allāh with those [prophets] who have passed on before. And ever is the command of Allāh a destiny decreed.

سُنَّةَ ٱللَّهِ فِى ٱلَّذِينَ خَلَوْا۟ مِن قَبْلُ وَلَن تَجِدَ لِسُنَّةِ ٱللَّهِ تَبْدِيلًا ۝٦٢

[This is] the established way of Allāh with those who passed on before; and you will not find in the way of Allāh any change.

ٱسْتِكْبَارًا فِى ٱلْأَرْضِ وَمَكْرَ ٱلسَّيِّئِ وَلَا يَحِيقُ ٱلْمَكْرُ ٱلسَّيِّئُ إِلَّا بِأَهْلِهِۦ فَهَلْ يَنظُرُونَ إِلَّا سُنَّتَ ٱلْأَوَّلِينَ فَلَن تَجِدَ لِسُنَّتِ ٱللَّهِ تَبْدِيلًا وَلَن تَجِدَ لِسُنَّتِ ٱللَّهِ تَحْوِيلًا ۝٤٣

[Due to] arrogance in the land and plotting of evil; but the evil plot does not encompass except its own people. Then do they await except the way [i.e., fate] of the former peoples? But you will never find in the way [i.e., established method] of Allāh any change, and you will never find in the way of Allāh any alteration.

فَلَمْ يَكُ يَنفَعُهُمْ إِيمَٰنُهُمْ لَمَّا رَأَوْا۟ بَأْسَنَا سُنَّتَ ٱللَّهِ ٱلَّتِى قَدْ خَلَتْ فِى عِبَادِهِۦ وَخَسِرَ هُنَالِكَ ٱلْكَٰفِرُونَ ۝٨٥

But never did their faith benefit them once they saw Our punishment. [It is] the established way of Allāh which has preceded among His servants. And the disbelievers thereupon lost [all].

سُنَّةَ ٱللَّهِ ٱلَّتِى قَدْ خَلَتْ مِن قَبْلُ وَلَن تَجِدَ لِسُنَّةِ ٱللَّهِ تَبْدِيلًا ۝٢٣

[This is] the established way of Allāh which has occurred before. And never will you find in the way of Allāh any change.