TSK · Genesis 7:8

And of every living thing of all flesh, two of every [sort] shalt thou bring into the ark, to keep [them] alive with thee; they shall be male and female.

Of every clean beast thou shalt take to thee by sevens, the male and his female: and of beasts that [are] not clean by two, the male and his female.

Wherein were all manner of fourfooted beasts of the earth, and wild beasts, and creeping things, and fowls of the air.