Preventing Islamic teachings from alteration does not stop at the preservation of the Qur’anic text; rather, it is also forbidden to introduce into the Prophet’s guidance (by saying or writing) anything that is contrary to its premise, values or teachings. The Prophet (blessings and peace be upon him) said: <> (Bukhari and Muslim) <> (An authentic hadith26 recorded by Ibn Hibbân, Abu Dâwood and at-Tirmidhi)
Thus, in matters of religion, one is not permitted to change Islamic teachings. Whatever is contrary to it is wrong and unacceptable. With this strict protection, Islam, as it was revealed, has been kept pure from myths and superstitions as well as changes that reflect the whims of people and leaders.
24 He meant specifically the four Caliphs who came after him.
25 That is, do not let go of it.
26 Hadith (hadeeth): the collected statements and actions of Prophet Muhammad (blessings and peace be upon him) that with the Qur’an form the basis of Islamic law