قال الله تعالى: {أَلَا لِلَّهِ الدِّينُ الْخَالِصُ} (الزمر: 3)

A--- Allah, the Almighty says: {Surely the religion (i.e. the worship and the obedience) is for Allah only}. (Az-Zumar, 3)

قال الله تعالى: {فَاعْبُدِ اللَّهَ مُخْلِصًا لَّهُ الدِّينَ} (الزُّمَر: 2)

Allah says: {So worship Allah (Alone) by doing religious deeds sincerely for Allah's sake only}. (Az-Zumar, 2)

قال النبي محمد ﷺ: «أسعد الناس بشفاعتي يوم القيامة من قال لا إله إلا الله خالصًا من قلبه». (صحيح البخاري)

Prophet Muhammad (Peace be upon him) says: "The luckiest person who will have my intercession on the Day of Resurrection will be the one who said sincerely from the bottom of his heart 'None has the right to be worshipped but Allah' ". (Sahih Bukhari)

وقال ﷺ أيضاً: «إن الله حرّم على النار من قال: لا إله إلا الله يبتغي بذلك وجه الله». (رواه البخاري ومسلم)

He (Peace be upon him) said also, "Allah has forbidden the (Hell) fire for those who say, 'None has the right to be worshipped but Allah' for Allah's sake only". (Bukhari and Muslim)