Genesis 7:2; Genesis 7:14; Genesis 7:15

2 "You shall take with you of every clean animal by sevens, a male and his female; and of the animals that are not clean two, a male and his female;

14 they and every beast after its kind, and all the cattle after their kind, and every creeping thing that creeps on the earth after its kind, and every bird after its kind, all sorts of birds.

15 So they went into the ark to Noah, by twos of all flesh in which was the breath of life.