وَلَوِ اجْتَمَعُوا كُلُّهُمْ عَلَى شَيْءٍ لَمْ يَكْتُبْهُ اللَّهُ تَعَالَى فِيهِ لِيَجْعَلُوهُ كَائِنًا لَمْ يَقْدِرُوا عَلَيْهِ
If all creatures gathered to bring into being something not decreed to occur, they could not do so.
In the first case, they could not prevent what is decreed; in the second, they cannot cause what has not been decreed. Together these statements affirm the firmness of Allah’s knowledge and definitive determination.