Leviticus 21:11

Then Moses said to Aaron and to his sons Eleazar and Ithamar, “Do not uncover your heads nor tear your clothes, so that you will not die and that He will not become wrathful against all the congregation. But your relatives, the whole house of Israel, shall weep over the burning which Yahweh has brought about.

except for his blood relatives who are nearest to him, his mother and his father and his son and his daughter and his brother,

‘The one who touches the corpse of any person shall be unclean for seven days.

“Groan silently; make no mourning for the dead. Bind on your headdress and put your shoes on your feet and do not cover your mustache and do not eat the bread of men.”