Surah Fusilat (The Verses Prefectly Explained), Verse 52

قُلْ اَرَءَیْتُمْ اِنْ كَانَ مِنْ عِنْدِ اللّٰهِ ثُمَّ كَفَرْتُمْ بِهٖ مَنْ اَضَلُّ مِمَّنْ هُوَ فِیْ شِقَاقٍ بَعِیْدٍ ۟

Qul araaitum in kaana min 'indil laahi summa kafar tum bihee man adallu mimman huwa fee shiqaqim ba'eed

“Say: "See ye if the (Revelation) is (really) from Allah, and yet do ye reject it? Who is more astray than one who is in a schism far (from any purpose)?"”

Quran 41:52 (Yusuf Ali Translation)