This verse functions as a foundational creedal statement, outlining the essential pillars of faith.
It specifically commands those who already profess belief to reaffirm and deepen their commitment to the entire continuum of divine revelation, including the scriptures given to previous prophets.
Surah 4:136:
O you who have believed, believe in Allah and His Messenger and the Book that He sent down upon His Messenger and the Scripture which He sent down before. And whoever disbelieves in Allah, His angels, His books, His messengers, and the Last Day has certainly gone far astray.
This verse establishes a "package deal" for faith. A believer is not permitted to pick and choose between revelations; to believe in the Quran while dismissing the "Scripture sent down before" is framed as going "far astray."
From a scholarly perspective, this places the previous scriptures in a position of permanent relevance. If a text is required for faith, it must maintain a level of integrity and truth that warrants that faith.
The plural use of "Books" (Kutubihi) is significant. It suggests that the collection of divine speech is a singular body of truth. If any part of this body were fundamentally corrupted or lost, the command to believe in "His books" would become an abstract or impossible task.
The verse assumes that when a person is told to "believe," they are being told to believe in something that is currently true and authoritative.
By linking the belief in Muhammad's "Book" with the "Scripture before," the Quran anchors itself to the history of the Bible. This creates a logical dependency: the legitimacy of the later revelation is built upon the validity of the former.
If the "Scripture before" is considered unreliable or textually compromised, it would logically undermine the foundation upon which the Quran’s own call to belief is constructed.
Surah 4:136 provides a clear mandate for the preservation and authority of the Bible. By making belief in the previous scriptures a non-negotiable pillar of faith, it grants the Torah and the Gospel a status of enduring divine truth.
This leads to a central question in theological discourse: if the Quran demands total belief in the previous books, can it simultaneously support a narrative that those same books were successfully altered by human hands?
Does the inclusive command to believe in "all His books" suggest that the previous scriptures possess an equal status of divine protection in the eyes of the Quran?