Charles Ellicott Commentary Genesis 7:8

"Of clean beasts, and of beasts that are not clean, and of birds, and of everything that creepeth upon the ground," — Genesis 7:8 (ASV)

Beasts. —Hebrew, of the clean cattle and of the cattle that was not clean. In the Chaldean Genesis, Xisuthrus also takes wild animals, seeds of all kinds of plants, gold and silver, male and female slaves, the “sons of the best,” and the “sons of the people” (pages 280-283). There it is a whole tribe, with their chief, who are saved—here one family only.