Faith in the heavenly books includes four things: one. To firmly believe that all the heavenly books have been sent down by Allah. In fact, Allah has spoken with these words. None of these sayings can be heard directly from Allah from behind the veil except through the medium of angels. Which of these has reached the Prophet through angels? Which of these has been recorded by Allah in His own hand? “When Allah speaks to a human being He says by revelation or from behind a curtain or by sending a messenger ; The messenger conveys whatever he wants, subject to God's permission. Verily, He is the All-Mighty , the All - Wise . Admonition of every subject and detailed explanation of every subject. ”[Surah A'raf , verse: 145] Two. Believing in the details that Allah has mentioned in these books. Such books are: Quran , Torah , Injil , Psalms , Sahifa Ibrahim and Sahifa Musa. Allaah has mentioned these books in the Qur'aan. And we will unanimously believe in the books which Allah has mentioned in unison. Just as Allah has commanded us to believe - "Say : I believe in the Book which Allah has sent down." [Surah Ash-Shura , verse : 15] Three. Believing in the news mentioned in these books which is known in Sahih Sanad. For example, the news of the Qur'an. In the same way, believing in the news that has not been changed or distorted in the previous heavenly books. Four. Believing that Allah has sent the Qur'an as a judge and confirmer over all books . "And We have sent down to you the Book with the truth , confirming what has been revealed before it (Musaddiq) and overseer (Muhaimin)." . That is to say, the Qur'an will affirm whatever is true in those books and will reject whatever has been distorted , changed and modified and will repeal the provisions of the books ; That will remove the previous provisions or impose new rules. Therefore , if the follower of the previous books is not reckless, then he has to submit to the Qur'an. "Those people to whom I gave the Book before this (Book) , they also believe in this (Book). And when it is recited to them, they say , " We believe in it , it is the truth from our ****." We were Muslims before that. ”[Surah Qasas , verses: 52-53]. It is the duty of every member of the Muhammadan Ummah to follow this Qur'an openly and secretly , to hold fast to the Qur'an , to realize the truth of the Qur'an. Exactly as Allah has commanded: “This is a Book which We have revealed , very good. So follow it and fear Allah that you may be shown mercy . Becoming , avoiding intimidation , taking advice from parables , learning from stories , gaining knowledge of Muhkam verses , surrendering to Mutashabih verses , stopping at Qur'anic boundaries , building resistance to defend Qur'an , memorizing Qur'an , reciting Qur'an , To think deeply about its verses , to pray with the Qur'an night and day , to work for the welfare of the Qur'an, to invite to the Qur'an on the basis of knowledge . By believing in the heavenly book, the servant gets many benefits. Notable among these are- 1. To be aware of the importance of Allah towards the servant. That is why He has sent separate books to guide every nation. 2. To know the relation of wisdom of Allah in case of imposition of Shariat or law. That is why he has given Shariat (law) suitable for the environment of every nation. He said: "I have given to each of you a law and a way." [Surah Maeda , verse: 46] To give thanks for this great blessing of Allah. 4. Giving importance to the Qur'an by reciting the Qur'an , researching the Qur'an, understanding the meaning of the Qur'an and acting accordingly.