ما الفرقة الضالة التي تكتفي بالقرآن دون السنة؟

The sect that relies solely on the Qur’an for evidence are the Khawarij of old, and in our time, they are the "Qur'aniyun," who hold the same belief. Indeed, denying the Sunnah is an act of disbelief that expels one from the faith, because it elucidates and explains the Qur’an, and it contains legislative rulings not found in the Qur’an. Whoever believes in the Qur’an must also believe in the Sunnah, based on the Almighty's saying: "And whatever the Messenger has given you—take it; and whatever he has forbidden you—refrain from it" [Al-Hashr:7], and His saying: "Whoever obeys the Messenger has certainly obeyed Allah" [An-Nisa:80], and His saying: "And We have sent down to you the Dhikr (the Qur’an) that you may explain to the people what has been sent down to them and that they might ponder" [An-Nahl:44].