37:11
فَ ٱسْتَفْتِ هِمْ أَ هُمْ أَشَدُّ خَلْقًا أَم مَّنْ خَلَقْ نَآ إِنَّ ا خَلَقْ نَٰ هُم مِّن طِينٍ لَّازِبٍۭ
Then inquire of them, [O Muhammad], "Are they a stronger [or more difficult] creation or those [others] We have created?" Indeed, We created men from sticky clay.