Charles Ellicott Commentary Leviticus 10:7

"And ye shall not go out from the door of the tent of meeting, lest ye die; for the anointing oil of Jehovah is upon you. And they did according to the word of Moses." — Leviticus 10:7 (ASV)

From the door of the tabernacle of the congregation. —Better, away from the entrance of the tent of meeting. (See Leviticus 1:3.) But Aaron and his sons are not to leave the court of the sanctuary to take part in the burial.

For the anointing of the Lord is upon you. —The reason why they are not to join in the funeral rites is that they had been devoted by this holy unction to the service of God. Earthly relations were, therefore, not to interfere with the duties to God. Hence, it was sin for priests to mourn when they ministered before the Lord. (See Leviticus 21:10-12.) This law was strictly observed during the second Temple. When an officiating priest heard of the death of a relative, he did not leave the sanctuary, lest it should appear that he had greater love for the dead person than for the living God.