Genesis 7:1-3

And the Lord said vnto Noah, Enter thou and all thine house into the Arke: for thee haue I seene righteous before me in this age.

Of euery cleane beast thou shalt take to thee by seuens, the male and his female: but of vncleane beastes by couples, the male and his female.

Of the foules also of the heauen by seuens, male and female, to keepe seede aliue vpon the whole earth.