Surat Aş-Şāffāt - سورة الصافات

فَاسْتَفْتِهِمْ أَهُمْ أَشَدُّ خَلْقًا أَم مَّنْ خَلَقْنَا ۚ إِنَّا خَلَقْنَاهُم مِّن طِينٍ لَّازِبٍ

Muhsin Khan: Then ask them (i.e. these polytheists, O Muhammad SAW): "Are they stronger as creation, or those (others like the heavens and the earth and the mountains, etc.) whom We have created?" Verily, We created them of a sticky clay.