Bible Verses About Ithamar: Forbidden to lament the death of his brothers, Nadab and Abihu

Then Moshe told Aharon and his sons El'azar and Itamar, "Don't unbind your hair or tear your clothes in mourning, so that you won't die and so that ADONAI won't be angry with the entire community. Rather, let your kinsmen - the whole house of Isra'el -mourn, because of the destruction ADONAI brought about with his fire.

Moreover, don't leave the entrance to the tent of meeting, or you will die, because ADONAI's anointing oil is on you."