This mitzvah commands that the Kohanim perform the avodah in the Beis HaMikdash while wearing the designated priestly garments (bigdei kehunah), as prescribed in the Torah (Shemos 28:2–4; Shemos 28:43). A regular Kohen wore four garments — kesones (tunic), michnasayim (breeches), avnet (belt), and migba’at (turban) — while the Kohen Gadol wore eight garments, including the choshen, ephod, me’il, and tzitz.

The Torah teaches that the garments are worn “for honor and for beauty” (lechavod u’lesif’eres) (Shemos 28:2), expressing the dignity and sanctity of avodas Hashem. The Kohen does not serve in ordinary clothing; he enters the Mikdash visibly marked as a servant of the Divine Presence.

Chazal teach that performing the avodah without the priestly garments invalidates the service and is considered a serious violation (Zevachim 17b). The garments are therefore not decorative but essential components of the avodah itself.

The bigdei kehunah transform the Kohen from a private individual into a public servant of Hashem. Through these garments, the Kohen represents Klal Yisrael before the Ribbono Shel Olam, standing in dignity and reverence in the place where the Shechinah rests.

Rambam

• Hilchos Klei HaMikdash 10:4:
  A Kohen who performs the avodah without the priestly garments invalidates the service.
• Rambam explains that the garments are an essential condition of avodah, not merely an enhancement of honor.

Sefer HaChinuch

• Mitzvah 99 — Sefer HaChinuch explains that the priestly garments elevate the thoughts of both the Kohen and the observers. External dignity awakens inner reverence, helping direct the heart toward awe of Hashem.

Talmud

• Zevachim 17b — The Gemara teaches that a Kohen who performs avodah without the priestly garments is considered like a non-Kohen performing the service, showing that the garments are integral to the Kohen’s role.

• Arachin 16a — Chazal teach that the garments of the Kohen Gadol atone for various sins of Israel, demonstrating their spiritual significance beyond their physical function.

Rashi

• On Shemos 28:2 — Rashi explains that the garments bring honor to the Kohen and reflect the dignity of Divine service.

Ramban

• On Shemos 28:2 — Ramban explains that the garments resemble royal attire, reflecting that the Kohen serves before the King of kings.

Midrash & Chazal

• Shemos Rabbah 38:3 — The priestly garments reflect heavenly honor, showing that the Kohanim serve in the presence of the Shechinah.

• Chazal emphasize that the Kohen does not appear in the Mikdash as a private person but as a representative of Israel standing before Hashem.

Acharonim & Modern Torah Giants

• Later Torah teachers emphasize that the bigdei kehunah demonstrate that avodas Hashem requires outer dignity that reflects inner awareness. The Kohen dresses differently not to elevate himself, but to honor the service he performs.
• External form shapes inner consciousness. When avodah is approached with seriousness and preparation, the heart becomes aligned with the act.

Chassidic & Mussar Classics

• Garments as Spiritual Expression — Chassidic teachings explain that garments represent the outer expression of the inner soul. Just as the Kohen’s garments express his sacred role, a Jew’s actions and conduct are the “garments” of the soul through which inner holiness becomes visible. The bigdei kehunah therefore symbolize the harmony between inner devotion and outward behavior.
• Dignity Creates Reverence — Mussar works emphasize that external dignity influences inner character. When a person approaches avodas Hashem with seriousness — in dress, posture, and preparation — the heart naturally becomes more reverent. The Kohen’s garments teach that reverence is cultivated not only through thought, but through visible acts of respect for holiness.

Contrast & Parallel Mitzvos

• Contrast — Unauthorized Service — Just as the Kohen must wear the proper garments to perform avodah, the Torah forbids unauthorized individuals from serving in the Mikdash. The garments define the Kohen’s role and distinguish sacred service from ordinary activity.

Parallel — Mitzvah 307 (Shemen HaMishchah)

• The priestly garments parallel the Shemen HaMishchah, which consecrated the Kohen for service. The anointing oil sanctified the Kohen permanently, while the garments sanctified him each time he performed the avodah. Together they demonstrate that holiness requires both designation and preparation.