Genesis 7:1-4

1And the LORD said to Noah, Come thou and all thy house into the ark; for thee have I seen righteous before me in this generation. 2Of 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.1 3Of fowls of the air also by sevens, the male and the female; to keep seed alive on the face of all the earth.2 4For yet seven days, and I will cause it to rain upon the earth forty days and forty nights; and every living thing that I have made will I destroy from the face of the earth.3