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; and seven pairs of every kind of bird of the air, male and female, to preserve their offspring on the face of all the earth. ... The clean and unclean animals, the birds, and everything that crawls along the ground came to Noah to enter the ark, two by two, male and female, as God had commanded Noah.