'Case' in the Bible

Then the glory that is Israel's God arose from the cherubim on which he had been seated and settled on the threshold of the Temple. He called out to the man dressed in linen who wore the writing case at his side.

Then I noticed the man dressed in linen who wore the writing case by his side as he brought back this message: "I've done as you have commanded me."

They are not to come in contact with a dead body, so they don't defile themselves, except in the case of their father, mother, son, daughter, brother, or for an unmarried sister, on whose behalf they may defile themselves.