במדבר, פרק א׳, פסוק נ״ב

When the Israelites set up camp in the desert, they followed a strict and highly organized layout where every individual and tribe had a precise location [ביאור שטיינזלץ]. This detailed arrangement, which took effect whenever the nation stopped to rest [אבן עזרא], was designed to create a clear separation between the general population and the Levites. While the Israelites were instructed to stay in the outer sections, the Levites were positioned in the center surrounding the Tabernacle. They served as a protective barrier, keeping strangers from coming too close and preventing God's anger from striking the people [העמק דבר, ביאור יש״ר, בכור שור]. This entire structure functioned like a living organism. The Tabernacle served as the heart, the source of life; the Levites surrounding it acted as the protective lungs; and the outer camps of the Israelites functioned as the external limbs [מלבי״ם].

The camp was structured through a careful system of divisions. One perspective suggests a distinction between a temporary camp and a permanently organized society. According to this view, the original concept of a standard did not refer to a piece of cloth, but rather to an organized social unit. Only later was the word borrowed to describe the physical flag that each group carried [שד״ל]. The primary approach among commentators, however, understands these divisions as a descending organizational hierarchy. The nation was separated into four main camps, each containing three tribes. The largest grouping was the main camp, followed by the specific tribe within it, and finally, the smaller family units that made up the tribe [רש״י, רש ר הירש]. This strict separation was necessary to ensure that tribes belonging to different groups did not mix with one another [אבן עזרא, מלבי״ם].

To maintain this order, each tribe used a clear identifying marker. The Hebrew term for these standards is linguistically related to the word for a palm tree. Just as a palm tree is tall and stands out from a distance, the standard served as an elevated, highly visible sign for the people [רש ר הירש]. In practice, every tribe carried its own physical flag. The background color of each flag perfectly matched the tribe's representative stone on the High Priest's breastplate, and each featured a unique symbol. For example, the flag of Judah was colored sky blue and displayed a lion. Reuben's flag was red and featured a drawing of mandrakes. Ephraim's flag was black, resembling an onyx stone, and showed a bull. Finally, the flag of Dan had a sapphire-like color and bore the image of a snake [ברכת אשר על התורה].