במדבר, פרק י׳, פסוק ח׳

The sound of the trumpets echoing through the desert camp marks a significant transition for the Israelites. Originally designed as a practical tool for organizing the people and signaling travel, the trumpets evolve into a permanent and holy institution meant to guide the nation for all time. The responsibility of sounding these blasts is given exclusively to the priests, the sons of Aaron. Initially, they use the trumpets to gather the community and direct the movements of the desert camp [רש"י, גור אריה]. Assigning this specific task to the priests carries deep meaning. Because the priests act as the representatives of the Torah and the holy service, their involvement sends a clear message. When the leader of the nation gathers the people through the priests, it shows that his authority does not come from his own personal power, but directly from the Torah [רש"ר הירש].

Because the trumpets are considered holy vessels of service, the primary approach among commentators is that the priests sounding them must be physically perfect, without any bodily blemish [מלבי"ם, רש"ר הירש, צפנת פענח]. However, there are exceptions to this rule. During unique public events, such as the Jubilee year or the grand national assembly, priests with physical blemishes are also permitted to participate in the blowing [צפנת פענח, רלב"ג, מלבי"ם]. A separate discussion exists regarding the desert period itself. Some maintain that during the desert journeys, the strict requirements regarding who could blow the trumpets were not enforced, and the rule demanding unblemished priests only applied to future generations [רלב"ג]. Others disagree strongly, arguing that even in the desert, the sons of Aaron were specifically required to perform this duty, even if the strict rule requiring them to be physically perfect was not yet in place [הכתב והקבלה].

As the Israelites prepare to enter the land of Israel, the purpose of the trumpets shifts from the immediate needs of the desert to the permanent life of a settled nation. Once in the land, the trumpets no longer signal travel. Instead, they become an essential part of the holy service. They are used when going to war against enemies, during days of joy and festivals, within the Temple service, and for the anointing of kings [ביאור שטיינזלץ, אבן עזרא, ביאור יש"ר, העמק דבר]. While the Commandment to use the trumpets is an eternal law for all generations, this permanence applies only to the practice, not to the objects themselves. Unlike the other holy vessels crafted by Moses in the desert, which were preserved and used by future generations, Moses's original silver trumpets were hidden away and not passed down. The sacred duty to sound the trumpets remained forever, but the physical instruments were continually replaced [חזקוני, צפנת פענח, מלבי"ם, ביאור שטיינזלץ].