You shall take seven pairs of every clean animal with you, the male and his female. Of the animals that are not clean, take two, the male and his female.
Also of the birds of the sky, seven and seven, male and female, to keep seed alive on the surface of all the earth.
Clean animals, animals that are not clean, birds, and everything that creeps on the ground
Noach built an altar to the LORD, and took of every clean animal, and of every clean bird, and offered burnt offerings on the altar.
They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.
and that you are to make a distinction between the holy and the common, and between the unclean and the clean;