What does Leviticus 10:7 mean?

Moses said, 'Don't leave the entrance to the tent where God meets with us, or you'll die, because the Lord's anointing oil is on you.' So they stayed where they were, just as Moses told them. Leviticus 10:7 - Modern Text Bible

(The priests must stay at their post, even after tragedy, because they're set apart for God's service.)