'Natural' in the Bible

Then I said, Ah, Lord! see, my soul has never been unclean, and I have never taken as my food anything which has come to a natural death or has been broken by beasts, from the time when I was young even till now; no disgusting flesh has ever come into my mouth.

so that the fishes of the sea, the birds of the sky, the animals of the field, all the creatures that crawl on the earth, and all the men that are on the face of the earth will tremble and shake at My presence; the mountains will crumble, the steep places will fall, and every wall will fall to the ground.

However, the priests are not to eat any bird or animal that has died a natural death or that has been torn apart."