Leviticus 10:3

10:3 Moses then said to Aaron, “This is what the Lord spoke: ‘Among the ones close to me I will show myself holy, and in the presence of all the people I will be honored.’” So Aaron kept silent.

Leviticus 10:7

10:7 but you must not go out from the entrance of the Meeting Tent lest you die, for the Lord’s anointing oil is on you.” So they acted according to the word of Moses.