Quran 10:99 — Surah Yunus, ayah 99

وَلَوۡ شَآءَ رَبُّكَ لَأٓمَنَ مَن فِي ٱلۡأَرۡضِ كُلُّهُمۡ جَمِيعًاۚ أَفَأَنتَ تُكۡرِهُ ٱلنَّاسَ حَتَّىٰ يَكُونُواْ مُؤۡمِنِينَ

And had your Lord willed, those on earth would have believed - all of them entirely. Then, [O Muhammad], would you compel the people in order that they become believers

Da Gospodar tvoj hoće, na Zemlji bi doista bili svi vjernici. Pa zašto onda ti da nagoniš ljude da budu vjernici?