Genesis 7:2
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.
Genesis 8:20
Noah built an altar to Yahweh, and took of every clean animal, and of every clean bird, and offered burnt offerings on the altar.
Leviticus 11:1-47
Yahweh spoke to Moses and to Aaron, saying to them,
Genesis 7:8
Clean animals, animals that are not clean, birds, and everything that creeps on the ground
Leviticus 10:10
and that you are to make a distinction between the holy and the common, and between the unclean and the clean;
Genesis 6:19-21
Of every living thing of all flesh, you shall bring two of every sort into the ship, to keep them alive with you. They shall be male and female.
Deuteronomy 14:1-21
You are the children of Yahweh your God: you shall not cut yourselves, nor make any baldness between your eyes for the dead.
Ezekiel 44:23
They shall teach my people the difference between the holy and the common, and cause them to discern between the unclean and the clean.
Acts 10:11-15
He saw heaven opened and a certain container descending to him, like a great sheet let down by four corners on the earth,