• أَرْذَل
• أَرْذَلنَا

Appears 4 times in the Quran.

1. 11:27 فَقَالَ ٱلْمَلَأُ ٱلَّذِينَ كَفَرُوا۟ مِن قَوْمِهِۦ مَا نَرَىٰكَ إِلَّا بَشَرًا مِّثْلَنَا وَمَا نَرَىٰكَ ٱتَّبَعَكَ إِلَّا ٱلَّذِينَ هُمْ أَرَاذِلُنَا بَادِىَ ٱلرَّأْىِ وَمَا نَرَىٰ لَكُمْ عَلَيْنَا مِن فَضْلٍۭ بَلْ نَظُنُّكُمْ كَٰذِبِينَ

   But the chiefs of those who disbelieved from among his people said: We do not consider you but a mortal like ourselves, and we do not see any have followed you but those who are the meanest of us at first thought and we do not see in you any excellence over us; nay, we deem you liars.
   

2. 16:70 وَٱللَّهُ خَلَقَكُمْ ثُمَّ يَتَوَفَّىٰكُمْ وَمِنكُم مَّن يُرَدُّ إِلَىٰٓ أَرْذَلِ ٱلْعُمُرِ لِكَىْ لَا يَعْلَمَ بَعْدَ عِلْمٍ شَيْـًٔا إِنَّ ٱللَّهَ عَلِيمٌ قَدِيرٌ

   And Allah has created you, then He causes you to die, and of you is he who is brought back to the worst part of life, so that after having knowledge he does not know anything; surely Allah is Knowing, Powerful.
   

3. 22:5 يَٰٓأَيُّهَا ٱلنَّاسُ إِن كُنتُمْ فِى رَيْبٍ مِّنَ ٱلْبَعْثِ فَإِنَّا خَلَقْنَٰكُم مِّن تُرَابٍ ثُمَّ مِن نُّطْفَةٍ ثُمَّ مِنْ عَلَقَةٍ ثُمَّ مِن مُّضْغَةٍ مُّخَلَّقَةٍ وَغَيْرِ مُخَلَّقَةٍ لِّنُبَيِّنَ لَكُمْ وَنُقِرُّ فِى ٱلْأَرْحَامِ مَا نَشَآءُ إِلَىٰٓ أَجَلٍ مُّسَمًّى ثُمَّ نُخْرِجُكُمْ طِفْلًا ثُمَّ لِتَبْلُغُوٓا۟ أَشُدَّكُمْ وَمِنكُم مَّن يُتَوَفَّىٰ وَمِنكُم مَّن يُرَدُّ إِلَىٰٓ أَرْذَلِ ٱلْعُمُرِ لِكَيْلَا يَعْلَمَ مِنۢ بَعْدِ عِلْمٍ شَيْـًٔا وَتَرَى ٱلْأَرْضَ هَامِدَةً فَإِذَآ أَنزَلْنَا عَلَيْهَا ٱلْمَآءَ ٱهْتَزَّتْ وَرَبَتْ وَأَنۢبَتَتْ مِن كُلِّ زَوْجٍۭ بَهِيجٍ

   O people! if you are in doubt about the raising, then surely We created you from dust, then from a small seed, then from a clot, then from a lump of flesh, complete in make and incomplete, that We may make clear to you; and We cause what We please to stay in the wombs till an appointed time, then We bring you forth as babies, then that you may attain your maturity; and of you is he who is caused to die, and of you is he who is brought back to the worst part of life, so that after having knowledge he does not know anything; and you see the earth sterile land, but when We send down on it the water, it stirs and swells and brings forth of every kind a beautiful herbage.
   

4. 26:111 قَالُوٓا۟ أَنُؤْمِنُ لَكَ وَٱتَّبَعَكَ ٱلْأَرْذَلُونَ

   They said: Shall we believe in you while the meanest follow you?