Sura 16 Al-Nahl (The Bee), aya 93

1. وَلَوْ شَاءَ اللَّهُ لَجَعَلَكُمْ أُمَّةً وَاحِدَةً وَلَٰكِنْ يُضِلُّ مَنْ يَشَاءُ وَيَهْدِي مَنْ يَشَاءُ ۚ وَلَتُسْأَلُنَّ عَمَّا كُنْتُمْ تَعْمَلُونَ

   And if Allah had willed, He could have made you (of) one religion, but He causes to stray whom He wills and guides whom He wills. And you will surely be questioned about what you used to do.

   16:93

Tafsiri: Saheeh International