Charles Ellicott Commentary Leviticus 10:4

"And Moses called Mishael and Elzaphan, the sons of Uzziel the uncle of Aaron, and said unto them, Draw near, carry your brethren from before the sanctuary out of the camp." — Leviticus 10:4 (ASV)

And Moses called ... the sons of Uzziel.—Uzziel was the son of Kohath, the younger brother of Amram. Since Amram was the father of Aaron, Uzziel was Aaron's uncle. Uzziel had three sons, of whom Mishael and Elzaphan were two (Exodus 6:18, 22). Eleazar and Ithamar, as ordinary priests, might have been employed in removing the remains of their slain brothers . Naturally, they were too deeply affected by this appalling scene; Moses therefore wanted to spare their feelings, and thus charged their first cousins with the task of carrying away the dead bodies.

The reason Izar and Hebron, Aaron's two older uncles, were passed over here is that the discontent of their children with the choice of Aaron and his sons for the priesthood—discontent that later broke out in open rebellion on the part of Korah, Izar’s son (Numbers 16:17)—had evidently begun to show itself when they witnessed the imposing ceremonies of the consecration. It was necessary that those who suffered so notably for transgressing the divine institutions should be buried by men whose allegiance to God’s law was unimpeachable.

Carry your brethren.—That is, your kinsmen. The expression "brother" is frequently used in the Bible in the sense of a near relation (Genesis 14:6; Genesis 24:48; Genesis 29:12–15, and other similar passages).

From before the sanctuary.—In the courtyard of the sanctuary, where the incense was offered in the midst of the rejoicing people, and where they were struck dead .