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

And Moses said to Aaron, and to Eleazar and Ithamar, his sons: Uncover not your heads, and rend not your garments, lest perhaps you die, and indignation come upon all the congregation. Let your brethren, and all the house of Israel, bewail the burning which the Lord has kindled.

But you shall not go out of the door of the tabernacle: otherwise you shall perish, for the oil of the holy unction is on you. And they did all things according to the precept of Moses.