וְאֶת־כָּל־חֶלְבּוֹ֙ יַקְטִ֣יר הַמִּזְבֵּ֔חָה כְּחֵ֖לֶב זֶ֣בַח הַשְּׁלָמִ֑ים וְכִפֶּ֨ר עָלָ֧יו הַכֹּהֵ֛ן מֵחַטָּאת֖וֹ וְנִסְלַ֥ח לֽוֹ׃ (פ)
他要把牠所有的脂肪放在壇上焚燒獻上，和平安祭牲的脂肪一樣。祭司要為他贖他的罪，他就必蒙赦免。
Guide for the Perplexed
The Levites did not sacrifice; they were not considered as being agents in the atonement of sins, for it was only the priest who was commanded “to make atonement for him” (Lev. 4:26) and “to make atonement for her” (Lev. 12:8). The duty of the Levites was the performance of vocal music; and a Levite became therefore disabled for service when he lost his voice. The object of the singing is to produce certain emotions; this object can only be attained by pleasing sounds and melodies accompanied by music, as was always the case in the Temple.