Leviticus 10:6, 12

And Moses said to Aaron, and to Eleazar and Ithamar, his sons, “Do not uncover your heads nor tear your clothes, lest you die, and wrath come upon all the people. But let your brethren, the whole house of Israel, bewail the burning which the LORD has kindled.

And Moses spoke to Aaron, and to Eleazar and Ithamar, his sons who were left: “Take the grain offering that remains of the offerings made by fire to the LORD, and eat it without leaven beside the altar; for it is most holy.