דברי הימים ב, פרק כ״ט, פסוק כ״ה

After a long period where the Temple service was halted, the return of music and song takes on the festive character of a brand-new dedication. The king's act of positioning the Levites at their stations is not merely a practical step; it serves as a renewed initiation ceremony for the Temple and its daily operations [מלבי״ם].

The introduction of musical instruments and a choir was not a personal or artistic invention by King David. The entire musical arrangement was established through a direct command from God, delivered through His prophets Nathan and Gad, with Gad acting as David's personal seer [רלב״ג, ביאור שטיינזלץ]. The primary approach among commentators is that highlighting this prophetic origin explains a notable gap in the biblical record. The requirement to accompany sacrifices with song and music is never explicitly mentioned in the original laws given by Moses. Instead, it was introduced later as a divine command transmitted by the prophets [מצודת דוד, ביאור שטיינזלץ].

Despite this later introduction, the sages of the Talmud found hints and a foundation for this musical requirement within the original texts of the Torah. They explained certain early descriptions of the Levites' work as referring to a primary duty that requires an additional, complementary action alongside it—specifically, the Levites singing while the sacrifice is offered. Furthermore, early references to the Levites carrying a burden were understood conceptually as lifting the voice in song. This aligns with other historical records where the leader of the Levites is described as being responsible for carrying the melody [רש״י, חומת אנך].