16:9
وَعَلَى ٱللَّهِ قَصْدُ ٱلسَّبِيلِ وَمِنْهَا جَآئِرٌ ۚ وَلَوْ شَآءَ لَهَدَىٰكُمْ أَجْمَعِينَ
waʿalā l-lahi qaṣdu l-sabīli wamin'hā jāirun walaw shāa lahadākum ajmaʿīna
God points out the right path, for some paths lead the wrong way: if He wished, He could guide you all.
And upon Allâh is the responsibility to explain the Straight Path. But there are ways that turn aside (such as Paganism, Judaism and Christianity). And had He willed, He would have guided you all (mankind).