When one of them dies and falls on something, that article becomes unclean; any article of wood, clothing, leather, sackcloth, or any implement used for work must be rinsed with water and will remain unclean until evening; then it will be clean.
Genesis 7:2
You are to take with you seven pairs of every kind of clean animal, a male and its mate; a pair of every kind of unclean animal, a male and its mate;
Genesis 7:8
The clean and unclean animals, the birds, and everything that crawls along the ground
Genesis 24:53
Then he brought out jewels of silver and gold, and articles of clothing, and he gave them to Rebekah. He also gave precious gifts to her brother and her mother.
Genesis 27:10
Then take it to your father to eat, so that he may bless you before he dies.”
Genesis 37:20
“Come now, let us kill him and throw him into one of the pits. We can say that a vicious animal has devoured him. Then we shall see what becomes of his dreams!”