• أَوْهَن
• تَهِنُوا۟
• مُوهِن
• وَهَنَ
• وَهْن
• وَهَنُوا۟

Appears 8 times in the Quran.

1. 3:139 وَلَا تَهِنُوا۟ وَلَا تَحْزَنُوا۟ وَأَنتُمُ ٱلْأَعْلَوْنَ إِن كُنتُم مُّؤْمِنِينَ

   And be not infirm, and be not grieving, and you shall have the upper hand if you are believers.
   

2. 3:146 وَكَأَيِّن مِّن نَّبِىٍّ قَٰتَلَ مَعَهُۥ رِبِّيُّونَ كَثِيرٌ فَمَا وَهَنُوا۟ لِمَآ أَصَابَهُمْ فِى سَبِيلِ ٱللَّهِ وَمَا ضَعُفُوا۟ وَمَا ٱسْتَكَانُوا۟ وَٱللَّهُ يُحِبُّ ٱلصَّٰبِرِينَ

   And how many a prophet has fought with whom were many worshippers of the Lord; so they did not become weak-hearted on account of what befell them in Allah's way, nor did they weaken, nor did they abase themselves; and Allah loves the patient.
   

3. 4:104 وَلَا تَهِنُوا۟ فِى ٱبْتِغَآءِ ٱلْقَوْمِ إِن تَكُونُوا۟ تَأْلَمُونَ فَإِنَّهُمْ يَأْلَمُونَ كَمَا تَأْلَمُونَ وَتَرْجُونَ مِنَ ٱللَّهِ مَا لَا يَرْجُونَ وَكَانَ ٱللَّهُ عَلِيمًا حَكِيمًا

   And be not weak hearted in pursuit of the enemy; if you suffer pain, then surely they (too) suffer pain as you suffer pain, and you hope from Allah what they do not hope; and Allah is Knowing, Wise.
   

4. 8:18 ذَٰلِكُمْ وَأَنَّ ٱللَّهَ مُوهِنُ كَيْدِ ٱلْكَٰفِرِينَ

   This, and that Allah is the weakener of the struggle of the unbelievers.
   

5. 19:4 قَالَ رَبِّ إِنِّى وَهَنَ ٱلْعَظْمُ مِنِّى وَٱشْتَعَلَ ٱلرَّأْسُ شَيْبًا وَلَمْ أَكُنۢ بِدُعَآئِكَ رَبِّ شَقِيًّا

   He said: My Lord! surely my bones are weakened and my head flares with hoariness, and, my Lord! I have never been unsuccessful in my prayer to Thee:
   

6. 29:41 مَثَلُ ٱلَّذِينَ ٱتَّخَذُوا۟ مِن دُونِ ٱللَّهِ أَوْلِيَآءَ كَمَثَلِ ٱلْعَنكَبُوتِ ٱتَّخَذَتْ بَيْتًا وَإِنَّ أَوْهَنَ ٱلْبُيُوتِ لَبَيْتُ ٱلْعَنكَبُوتِ لَوْ كَانُوا۟ يَعْلَمُونَ

   The parable of those who take guardians besides Allah is as the parable of the spider that makes for itself a house; and most surely the frailest of the houses is the spider's house did they but know.
   

7. 31:14 وَوَصَّيْنَا ٱلْإِنسَٰنَ بِوَٰلِدَيْهِ حَمَلَتْهُ أُمُّهُۥ وَهْنًا عَلَىٰ وَهْنٍ وَفِصَٰلُهُۥ فِى عَامَيْنِ أَنِ ٱشْكُرْ لِى وَلِوَٰلِدَيْكَ إِلَىَّ ٱلْمَصِيرُ

   And We have enjoined man in respect of his parents-- his mother bears him with faintings upon faintings and his weaning takes two years-- saying: Be grateful to Me and to both your parents; to Me is the eventual coming.
   

8. 47:35 فَلَا تَهِنُوا۟ وَتَدْعُوٓا۟ إِلَى ٱلسَّلْمِ وَأَنتُمُ ٱلْأَعْلَوْنَ وَٱللَّهُ مَعَكُمْ وَلَن يَتِرَكُمْ أَعْمَٰلَكُمْ

   And be not slack so as to cry for peace and you have the upper hand, and Allah is with you, and He will not bring your deeds to naught.