فَاسْتَفْتِهِمْ اَهُمْ اَشَدُّ خَلْقًا اَمْ مَّنْ خَلَقْنَا ۗاِنَّا خَلَقْنٰهُمْ مِّنْ طِيْنٍ لَّازِبٍ ( الصافات: ١١ )
Fastaftihim ahum ashaddu khalqan am man khalaqnaa; innaa khalaqnaahum min teenil laazib (aṣ-Ṣāffāt 37:11)
Then inquire of them, [O Muhammad], "Are they a stronger [or more difficult] creation or those [others] We have created?" Indeed, We created them [i.e., men] from sticky clay. (As-Saffat  : 11)
1 Mufti Taqi Usmani
Now ask them, “Are they stronger in the formation of their bodies, or those (other beings) that We have created?” Certainly, We did create them from sticky clay.