דברים, פרק ל״א, פסוק י״ט

Moments before the end of Moses' life, a dramatic shift occurs from prophetic revelation to a written and studied text. A divine command harnesses the power of poetry to ensure that historical memory and faith pass down through the generations through writing, deep study, and musical memorization. There is an immediate urgency for Moses to begin the work of writing and teaching, acting swiftly before transferring the authority of leadership to Joshua [אור החיים, צרור המור]. The instruction to write is directed at multiple people, prompting different understandings of who exactly is involved in this task. One perspective views it as a shared directive for Moses and Joshua, with Moses writing and Joshua assisting or reading alongside him, elevating the process of transferring authority and prophecy [רמב״ן, אברבנאל, בכור שור]. Another approach broadens the instruction to include Moses and anyone capable of writing, aiming to create multiple copies for widespread distribution among the masses [אבן עזרא, ביאור יש״ר]. From this, the concept developed that it is a Commandment for every Israelite in every generation to personally write a Torah scroll, thereby increasing the presence of sacred books in the world [תורה תמימה, העמק דבר, הירש].

The primary approach among commentators is that this divinely commanded song refers to the adjacent poetic portion of the Torah. It is called a song because it is composed in a rhythmic structure and is intended to be sung regularly. This musical and poetic form serves as a powerful tool to help the people remember its historical and prophetic content throughout the ages [רמב״ן, רשב״ם, שטיינזלץ]. Conversely, another line of thought argues that it is halakhically illogical to write only a single portion in isolation. Therefore, the concept of the song actually encompasses the entire Torah. The entire Torah is likened to a song, echoing an ancient practice of legislating laws and statutes through poetry to make them easier to memorize [רלב״ג, העמק דבר, אם למקרא].

The responsibility to teach this material is directed primarily at Moses, establishing him as the central teacher [רמב״ן]. This outlines a three-stage pedagogical process consisting of writing the text, understanding it, and memorizing it [אור החיים]. The study process is not merely a technical reading. It requires explaining the deep and difficult meanings [אבן עזרא] and repeating the material endlessly until the student fully comprehends it and knows how to fulfill the Commandments [תורה תמימה]. The final stage of this educational process requires that the text become entirely fluent and orderly in the mouths of the Israelites [אבן עזרא, בכור שור]. This fluency implies the creation of memory aids and the use of biblical cantillation, which are essential tools for preserving the oral tradition, understanding the written words, and reading them accurately with the proper melody [תורה תמימה, צפנת פענח, אם למקרא].

The ultimate purpose of this entire process is for the song to serve as an enduring witness. The prevailing view among commentators is that it acts as a testimony of warning and rebuke. In the future, when the people sin, face punishment, and wonder why such troubles have befallen them, the song flowing fluently from their lips will serve as living proof that they were warned in advance. It will clarify that their hardships are not random, but the direct result of breaking their covenant, thereby awakening them to recognize their sins [רשב״ם, הירש, צרור המור]. In contrast, a unique perspective interprets this witness as an absolute defense for the Israelites. According to this view, the song was written as a testimony for God Himself, serving to remind Him that human nature is inherently prone to sin. This testimony provides a basis for divine mercy, ensuring that even after a moral failing, God will not destroy His people, but will instead accept their repentance and redeem them [מלבי״ם, אלשיך].