Where do the measures prescribed in Lev. 10:6-7 have their background?
Leviticus 10:6 (ESV)
6And Moses said to Aaron and to Eleazar and Ithamar his sons, “Do not let the hair of your heads hang loose, and do not tear your clothes, lest you die, and wrath come upon all the congregation;but let your brothers, the whole house of Israel, bewail the burning that the LORD has kindled.
The measures taken have their background in the requirements for the priests, outlined in Leviticus 21:1–24.
6 And Moses said to Aaron and to Eleazar and Ithamar his sons, “Do not let the hair of your heads hang loose, and do not tear your clothes, lest you die, and wrath come upon all the congregation; but let your brothers, the whole house of Israel, bewail the burning that the LORD has kindled.