الشورى — Asy-Syura Ayat 8
وَلَوْ شَاۤءَ اللّٰهُ لَجَعَلَهُمْ اُمَّةً وَّاحِدَةً وَّلٰكِنْ يُّدْخِلُ مَنْ يَّشَاۤءُ فِيْ رَحْمَتِهٖۗ وَالظّٰلِمُوْنَ مَا لَهُمْ مِّنْ وَّلِيٍّ وَّلَا نَصِيْرٍ
Wa lau syā'allāhu laja‘alahum ummataw wāḥidataw wa lākiy yudkhilu may yasyā'u fī raḥmatih(ī), waẓ-ẓālimūna mā lahum miw waliyyiw wa lā naṣīr(in).
"And if Allah willed, He could have made them [of] one religion, but He admits whom He wills into His mercy. And the wrongdoers have not any protector or helper."