Leviticus

This is the law, when a man dieth in a tent: all that come into the tent, and all that is in the tent, shall be unclean seven days.

And another of his disciples said unto him, Lord, suffer me first to go and bury my father.

I have not eaten thereof in my mourning, neither have I taken away ought thereof for any unclean use, nor given ought thereof for the dead: but I have hearkened to the voice of the Lord my God, and have done according to all that thou hast commanded me.

He that toucheth the dead body of any man shall be unclean seven days.

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.