Leviticus 10:5-6

⁵And they came near, and carried them in their coats to without the camp; as Moses had spoken.

⁶And Moses said unto Aaron, and unto Elazar and unto Ithamar, his sons, The hair of your head you shall not let grow long, and your garments you shall not rend, that ye die not, and that he be not wroth upon the whole congregation; but your brethren, the whole house of Israel, may bewail the burning which the Lord hath kindled.