A ---There are so many proofs from the Glorious Qur'an and the Prophetic Sunnah, some of which are: Allah the Almighty says: {Verily, those who disbelieve in Allah and His Messengers and wish to make distinction between Allah and His Messengers (by believing in Allah and disbelieving in His Messengers) saying, "We believe in some but reject others,” and wish to adopt a way in between.

They are in truth disbelievers. And We have prepared for the disbelievers a humiliating torment. And those who believe in Allah and His Messengers and make no distinction between any of them (Messengers), We shall give them their rewards; and Allah is Ever Oft-Forgiving, Most Merciful}. (An-Nisa', 150-152)

Allah's Messenger (Peace be upon him) says: "I believed in Allah and His Messengers.” (Bukhari and Muslim)