Genesis 6:19
And of every living thing of all flesh, two of every sort shall you bring into the ark, to keep them alive with you; they shall be male and female.
Genesis 7:2-3
Of every clean beast you shall take to you by sevens, the male and his female: and of beasts that are not clean by two, the male and his female.
Genesis 7:8-9
Of clean beasts, and of beasts that are not clean, and of fowls, and of everything that creeps upon the earth,
Genesis 7:15-16
And they went in unto Noah into the ark, two by two of all flesh, in which is the breath of life.
Genesis 8:17
Bring forth with you every living thing that is with you, of all flesh, both of fowl, and of cattle, and of every creeping thing that creeps upon the earth; that they may breed abundantly in the earth, and be fruitful, and multiply upon the earth.
Psalm 36:6
Your righteousness is like the great mountains; your judgments are a great deep: O LORD, you preserve man and beast.