Genesis Chapter 7, Verse 3
From BibleWiki
3: Of fowls also of the air by sevens, the male and the female; to keep seed alive upon the face of all the earth.
3: But of the beasts that are unclean two and two, the male and the
female. Of the fowls also of the air seven and seven, the male and the
female: that seed may be saved upon the face of the whole earth.
3: And of clean flying creatures of the sky sevens, male and female, and of all unclean flying creatures pairs, male and female, to maintain seed on all the earth.
Genesis Chapter 7, Verse 3/commentary

