وَكَمْ أَهْلَكْنَا قَبْلَهُم مِّن قَرْنٍ هَلْ تُحِسُّ مِنْهُم مِّنْ أَحَدٍ أَوْ تَسْمَعُ لَهُمْ رِكْزًۢا
Wa kam ahlaknaa qabla hum min qarnin hal tuhissu minhum min ahadin aw tasma'u lahum rikzaa
How many generations We have destroyed before them! Do you perceive a single one of them now, or hear as much as a whisper?
And how many generations we have destroyed before them! Do you sense a single one of them now, or hear from them so much as a whisper?
Rikzan names the faintest noise a person could catch, and this line is the single place the word is used, standing as the surah's last word. Surah Maryam opened with Zakariya calling his Lord in a voice deliberately kept low; it closes on generations who cannot manage even that much sound.