Rodzaju 7:2

Z każdego zwierzęcia czystego weź sobie po siedem par, samca i samicę jego; ale ze zwierząt nieczystych – po jednej parze, samca i samicę jego.

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.