Even if his father or mother or brother or sister should die, he is not to defile himself, because the symbol of consecration to his God is upon his head.
KJV
He shall not make himself unclean for his father, or for his mother, for his brother, or for his sister, when they die: because the consecration of his God [is] upon his head.
ASV
He shall not make himself unclean for his father, or for his mother, for his brother, or for his sister, when they die; because his separation unto God is upon his head.