The process of offering specific animal parts on the altar during the days of inauguration requires strict attention to detail, reflecting a precise divine order. Moses gathers the various parts, including the diaphragm, to bring them to the altar [ביאור שטיינזלץ].
In the instructions for the offering, there appears to be a repetition in mentioning both the fat and the fat tail. One approach explains that "fat" serves as a general category here, and the phrasing simply clarifies that the fat being offered is specifically the tail [רד צ הופמן]. Conversely, another perspective notes that biblical language refers to all fat by the same term, even types permitted for consumption. The fat and the tail are separated in the instructions to show that during the inauguration, the fat tail was offered with the elevated status of a burnt offering, rather than as the standard fat typical of regular peace offerings [העמק דבר]. Additionally, the right thigh is lifted and entirely dedicated to God; it is only from God's own portion that it is then given to the priests [מלבי״ם].
The careful listing of these fats and organs repeats instructions already taught in earlier offerings. This repetition ensures that future generations know the exact method for handling and burning each part. Beyond practical instruction, this detailed breakdown expresses a broader concept. God wanted to grant the Israelites merit by giving them commandments that encompass all areas of life and all levels of creation, including the inanimate, plant, and animal worlds. Just as there are distinct levels within the offerings—parts burned completely, parts eaten by the owners, and parts given to the priests—every commandment and degree of holiness is mapped out with exact divine wisdom. The repetition of these details ultimately emphasizes the absolute perfection of the command, a complete system to which nothing can be added and from which nothing can be removed [מלבי״ם].