א וַיְדַבֵּ֥ר יְהוָ֖ה אֶל־מֹשֶׁ֥ה לֵּאמֹֽר׃

The Lord spoke to Moses, saying:

ב צַ֤ו אֶֽת־אַהֲרֹן֙ וְאֶת־בָּנָ֣יו לֵאמֹ֔ר זֹ֥את תּוֹרַ֖ת הָעֹלָ֑ה הִ֣וא הָעֹלָ֡ה עַל֩ מוֹקְדָ֨ה עַל־הַמִּזְבֵּ֤חַ כָּל־הַלַּ֙יְלָה֙ עַד־הַבֹּ֔קֶר וְאֵ֥שׁ הַמִּזְבֵּ֖חַ תּ֥וּקַד בּֽוֹ׃

Command Aaron and his sons: Since the following laws pertain to the priestly responsibilities and privileges, the command was directed specifically toward Aaron and his sons. Saying: This is the law of the burnt offering. Although the laws of the burnt offering were essentially delineated in the beginning of Leviticus (see chap. 1), an additional point is added by the verse here: It is the burnt offering that burns on the pyre on the altar all night until the morning, and the fire of the altar shall be kept burning on it. Most of the Temple service was performed during the day, including the slaughter of the burnt offering and the sprinkling of its blood upon the altar. The burning of the offering upon the altar, however, could be performed at night. When many offerings were sacrificed during the day, they would remain burning on the pyre throughout the night. The fire on the altar was especially intense, as the wood of the pyre was coupled with the fat of the portions of the animals that were burned on the altar. The burnt offering, which was burned in its entirety, burned slowly on the pyre relative to the other offerings, as its fat was covered by its flesh. It was also offered after all the other offerings had been sacrificed. Consequently, it remained on the altar throughout the night.