דברי הימים א, פרק כ״ג, פסוק ה׳

The final arrangement of the Levite duties in the Temple involved a massive organization of manpower, assigning distinct roles to thousands of men to ensure the sacred service functioned perfectly. As the division of labor was completed, four thousand men were appointed as gatekeepers, while another four thousand were assigned to musical duties. What set this specific group of musicians apart was their use of physical instruments to praise God. This contrasts with a much larger group of twenty-four thousand Levites who were appointed to sing and offer praise using their voices alone [מצודת דוד].

King David personally took credit for the creation of these instruments, speaking directly in the first person as he organized these roles [ביאור שטיינזלץ]. He was not merely an administrator; David actively initiated, designed, and prepared these musical tools well in advance. His specific goal was to provide the Levites with the exact instruments they needed to play while they offered their songs of praise to God [רלב״ג, ביאור שטיינזלץ].