Genesis 7:1-3

Then the Lord said to Noah, “Enter the ark, you and all your household, for you alone I have seen to be righteous before Me in this generation.

You shall take with you seven pairs of every clean animal, a male and his female; and two of the animals that are not clean, a male and his female;

also of the birds of the sky, seven pairs, male and female, to keep their offspring alive on the face of all the earth.