• سَفَاهَة
• سَفَه
• سَفِهَ
• سَفِيه
• سَفِيهنَا

Appears 10 times in the Quran.

1. 2:13 وَإِذَا قِيلَ لَهُمْ ءَامِنُوا۟ كَمَآ ءَامَنَ ٱلنَّاسُ قَالُوٓا۟ أَنُؤْمِنُ كَمَآ ءَامَنَ ٱلسُّفَهَآءُ أَلَآ إِنَّهُمْ هُمُ ٱلسُّفَهَآءُ وَلَٰكِن لَّا يَعْلَمُونَ

   And when it is said to them: Believe as the people believe they say: Shall we believe as the fools believe? Now surely they themselves are the fools, but they do not know.
   

2. 2:130 وَمَن يَرْغَبُ عَن مِّلَّةِ إِبْرَٰهِۦمَ إِلَّا مَن سَفِهَ نَفْسَهُۥ وَلَقَدِ ٱصْطَفَيْنَٰهُ فِى ٱلدُّنْيَا وَإِنَّهُۥ فِى ٱلْءَاخِرَةِ لَمِنَ ٱلصَّٰلِحِينَ

   And who forsakes the religion of Ibrahim but he who makes himself a fool, and most certainly We chose him in this world, and in the hereafter he is most surely among the righteous.
   

3. 2:142 سَيَقُولُ ٱلسُّفَهَآءُ مِنَ ٱلنَّاسِ مَا وَلَّىٰهُمْ عَن قِبْلَتِهِمُ ٱلَّتِى كَانُوا۟ عَلَيْهَا قُل لِّلَّهِ ٱلْمَشْرِقُ وَٱلْمَغْرِبُ يَهْدِى مَن يَشَآءُ إِلَىٰ صِرَٰطٍ مُّسْتَقِيمٍ

   The fools among the people will say: What has turned them from their qiblah which they had? Say: The East and the West belong only to Allah; He guides whom He likes to the right path.
   

4. 2:282 يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِذَا تَدَايَنتُم بِدَيْنٍ إِلَىٰٓ أَجَلٍ مُّسَمًّى فَٱكْتُبُوهُ وَلْيَكْتُب بَّيْنَكُمْ كَاتِبٌۢ بِٱلْعَدْلِ وَلَا يَأْبَ كَاتِبٌ أَن يَكْتُبَ كَمَا عَلَّمَهُ ٱللَّهُ فَلْيَكْتُبْ وَلْيُمْلِلِ ٱلَّذِى عَلَيْهِ ٱلْحَقُّ وَلْيَتَّقِ ٱللَّهَ رَبَّهُۥ وَلَا يَبْخَسْ مِنْهُ شَيْـًٔا فَإِن كَانَ ٱلَّذِى عَلَيْهِ ٱلْحَقُّ سَفِيهًا أَوْ ضَعِيفًا أَوْ لَا يَسْتَطِيعُ أَن يُمِلَّ هُوَ فَلْيُمْلِلْ وَلِيُّهُۥ بِٱلْعَدْلِ وَٱسْتَشْهِدُوا۟ شَهِيدَيْنِ مِن رِّجَالِكُمْ فَإِن لَّمْ يَكُونَا رَجُلَيْنِ فَرَجُلٌ وَٱمْرَأَتَانِ مِمَّن تَرْضَوْنَ مِنَ ٱلشُّهَدَآءِ أَن تَضِلَّ إِحْدَىٰهُمَا فَتُذَكِّرَ إِحْدَىٰهُمَا ٱلْأُخْرَىٰ وَلَا يَأْبَ ٱلشُّهَدَآءُ إِذَا مَا دُعُوا۟ وَلَا تَسْـَٔمُوٓا۟ أَن تَكْتُبُوهُ صَغِيرًا أَوْ كَبِيرًا إِلَىٰٓ أَجَلِهِۦ ذَٰلِكُمْ أَقْسَطُ عِندَ ٱللَّهِ وَأَقْوَمُ لِلشَّهَٰدَةِ وَأَدْنَىٰٓ أَلَّا تَرْتَابُوٓا۟ إِلَّآ أَن تَكُونَ تِجَٰرَةً حَاضِرَةً تُدِيرُونَهَا بَيْنَكُمْ فَلَيْسَ عَلَيْكُمْ جُنَاحٌ أَلَّا تَكْتُبُوهَا وَأَشْهِدُوٓا۟ إِذَا تَبَايَعْتُمْ وَلَا يُضَآرَّ كَاتِبٌ وَلَا شَهِيدٌ وَإِن تَفْعَلُوا۟ فَإِنَّهُۥ فُسُوقٌۢ بِكُمْ وَٱتَّقُوا۟ ٱللَّهَ وَيُعَلِّمُكُمُ ٱللَّهُ وَٱللَّهُ بِكُلِّ شَىْءٍ عَلِيمٌ

   O you who believe! when you deal with each other in contracting a debt for a fixed time, then write it down; and let a scribe write it down between you with fairness; and the scribe should not refuse to write as Allah has taught him, so he should write; and let him who owes the debt dictate, and he should be careful of (his duty to) Allah, his Lord, and not diminish anything from it; but if he who owes the debt is unsound in understanding, or weak, or (if) he is not able to dictate himself, let his guardian dictate with fairness; and call in to witness from among your men two witnesses; but if there are not two men, then one man and two women from among those whom you choose to be witnesses, so that if one of the two errs, the second of the two may remind the other; and the witnesses should not refuse when they are summoned; and be not averse to writing it (whether it is) small or large, with the time of its falling due; this is more equitable in the sight of Allah and assures greater accuracy in testimony, and the nearest (way) that you may not entertain doubts (afterwards), except when it is ready merchandise which you give and take among yourselves from hand to hand, then there is no blame on you in not writing it down; and have witnesses when you barter with one another, and let no harm be done to the scribe or to the witness; and if you do (it) then surely it will be a transgression in you, and be careful of (your duty) to Allah, Allah teaches you, and Allah knows all things.
   

5. 4:5 وَلَا تُؤْتُوا۟ ٱلسُّفَهَآءَ أَمْوَٰلَكُمُ ٱلَّتِى جَعَلَ ٱللَّهُ لَكُمْ قِيَٰمًا وَٱرْزُقُوهُمْ فِيهَا وَٱكْسُوهُمْ وَقُولُوا۟ لَهُمْ قَوْلًا مَّعْرُوفًا

   And do not give away your property which Allah has made for you a (means of) support to the weak of understanding, and maintain them out of (the profits of) it, and clothe them and speak to them words of honest advice.
   

6. 6:140 قَدْ خَسِرَ ٱلَّذِينَ قَتَلُوٓا۟ أَوْلَٰدَهُمْ سَفَهًۢا بِغَيْرِ عِلْمٍ وَحَرَّمُوا۟ مَا رَزَقَهُمُ ٱللَّهُ ٱفْتِرَآءً عَلَى ٱللَّهِ قَدْ ضَلُّوا۟ وَمَا كَانُوا۟ مُهْتَدِينَ

   They are lost indeed who kill their children foolishly without knowledge, and forbid what Allah has given to them forging a lie against Allah; they have indeed gone astray, and they are not the followers of the right course.
   

7. 7:66 قَالَ ٱلْمَلَأُ ٱلَّذِينَ كَفَرُوا۟ مِن قَوْمِهِۦٓ إِنَّا لَنَرَىٰكَ فِى سَفَاهَةٍ وَإِنَّا لَنَظُنُّكَ مِنَ ٱلْكَٰذِبِينَ

   The chiefs of those who disbelieved from among his people said: Most surely we see you in folly, and most surely we think you to be of the liars.
   

8. 7:67 قَالَ يَٰقَوْمِ لَيْسَ بِى سَفَاهَةٌ وَلَٰكِنِّى رَسُولٌ مِّن رَّبِّ ٱلْعَٰلَمِينَ

   He said: O my people! there is no folly in me, but I am an messenger of the Lord of the worlds.
   

9. 7:155 وَٱخْتَارَ مُوسَىٰ قَوْمَهُۥ سَبْعِينَ رَجُلًا لِّمِيقَٰتِنَا فَلَمَّآ أَخَذَتْهُمُ ٱلرَّجْفَةُ قَالَ رَبِّ لَوْ شِئْتَ أَهْلَكْتَهُم مِّن قَبْلُ وَإِيَّٰىَ أَتُهْلِكُنَا بِمَا فَعَلَ ٱلسُّفَهَآءُ مِنَّآ إِنْ هِىَ إِلَّا فِتْنَتُكَ تُضِلُّ بِهَا مَن تَشَآءُ وَتَهْدِى مَن تَشَآءُ أَنتَ وَلِيُّنَا فَٱغْفِرْ لَنَا وَٱرْحَمْنَا وَأَنتَ خَيْرُ ٱلْغَٰفِرِينَ

   And Musa chose out of his people seventy men for Our appointment; so when the earthquake overtook them, he said: My Lord! if Thou hadst pleased, Thou hadst destroyed them before and myself (too); wilt Thou destroy us for what the fools among us have done? It is naught but Thy trial, Thou makest err with it whom Thou pleasest and guidest whom Thou pleasest: Thou art our Guardian, therefore forgive us and have mercy on us, and Thou art the best of the forgivers.
   

10. 72:4 وَأَنَّهُۥ كَانَ يَقُولُ سَفِيهُنَا عَلَى ٱللَّهِ شَطَطًا

    And that the foolish amongst us used to forge extravagant things against Allah: