The Quran root س ف ه s-f-h

وَإِذَا قِيلَ لَهُمْ آمِنُوا كَمَا آمَنَ النَّاسُ قَالُوا أَنُؤْمِنُ كَمَا آمَنَ السُّفَهَاءُ أَلَا إِنَّهُمْ هُمُ السُّفَهَاءُ وَلَٰكِن لَّا يَعْلَمُونَ ١٣

السُّفَهَاءُ l-sufahāu · the fools

And when it is said to them, "Believe as the people have believed," they say, "Should we believe as the foolish have believed?" Unquestionably, it is they who are the foolish, but they know [it] not. (Surah Al-Baqarah, 2:13)

سَيَقُولُ السُّفَهَاءُ مِنَ النَّاسِ مَا وَلَّاهُمْ عَن قِبْلَتِهِمُ الَّتِي كَانُوا عَلَيْهَا قُل لِّلَّهِ الْمَشْرِقُ وَالْمَغْرِبُ يَهْدِي مَن يَشَاءُ إِلَىٰ صِرَاطٍ مُّسْتَقِيمٍ ١٤٢

السُّفَهَاءُ l-sufahāu · the foolish ones

The foolish among the people will say, "What has turned them away from their qiblah, which they used to face?" Say, "To Allāh belongs the east and the west. He guides whom He wills to a straight path." (Surah Al-Baqarah, 2:142)

قَالَ الْمَلَأُ الَّذِينَ كَفَرُوا مِن قَوْمِهِ إِنَّا لَنَرَاكَ فِي سَفَاهَةٍ وَإِنَّا لَنَظُنُّكَ مِنَ الْكَاذِبِينَ ٦٦

سَفَاهَةٍ safāhatin · foolishness

Said the eminent ones who disbelieved among his people, "Indeed, we see you in foolishness, and indeed, we think you are of the liars." (Surah Al-A'raf, 7:66)

وَمَن يَرْغَبُ عَن مِّلَّةِ إِبْرَاهِيمَ إِلَّا مَن سَفِهَ نَفْسَهُ وَلَقَدِ اصْطَفَيْنَاهُ فِي الدُّنْيَا وَإِنَّهُ فِي الْآخِرَةِ لَمِنَ الصَّالِحِينَ ١٣٠

سَفِهَ safiha · fooled

And who would be averse to the religion of Abraham except one who makes a fool of himself. And We had chosen him in this world, and indeed he, in the Hereafter, will be among the righteous. (Surah Al-Baqarah, 2:130)

قَدْ خَسِرَ الَّذِينَ قَتَلُوا أَوْلَادَهُمْ سَفَهًا بِغَيْرِ عِلْمٍ وَحَرَّمُوا مَا رَزَقَهُمُ اللَّهُ افْتِرَاءً عَلَى اللَّهِ قَدْ ضَلُّوا وَمَا كَانُوا مُهْتَدِينَ ١٤٠

سَفَهًا safahan · (in) foolishness

They will have lost who killed their children in foolishness without knowledge and prohibited what Allāh had provided for them, inventing untruth about Allāh. They have gone astray and were not [rightly] guided. (Surah Al-An'am, 6:140)