Genesis 7:1-3

Then the LORD said to Noah, “Go into the ark, you and all your family, because I have found you righteous in this generation.

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.