At-Takwir 81:27

It is but a reminder to the worlds,

It is not except a reminder to the worlds

27. Verily, this (the Qur’ân) is no less than a Reminder to (all) the ‘Âlamîn (mankind and jinn)[3]

[3] (V.81:27)
a) Narrated Abu Hurairah رضي الله عنه: The Prophet صلى الله عليه وسلم said, "There was no Prophet among the Prophets but was given miracles because of which people had security or had belief, but what I have been given is the Divine Revelation which Allâh has revealed to me. So I hope that my followers will be more than those of any other Prophet on the Day of Resurrection." (Sahih Al-Bukhari, Vol.9, Hadith No.379)
b) It is obligatory to have Belief in the Messengership of the Prophet (Muhammad صلى الله عليه وسلم).
Narrated Abu Hurairah رضي الله عنه: Allâh’s Messenger صلى الله عليه وسلم said: "By Him (Allâh) in Whose Hand Muhammad’s soul is, there is none from amongst the Jews and Christians (of these present nations) who hears about me and then dies without believing in the Message with which I have been sent (i.e. Islâmic Monotheism), but he will be from the dwellers of the (Hell) Fire." (Sahih Muslim , the Book of Faith, Vol.1, Chapter No.240). See also (V.3:85) and (V.3:116).

This is naught else than a reminder unto creation,