'Natural' in the Bible

You may not have as food anything which has come to a natural death; the man from another country who is living with you may take it for food, or you may get a price for it from one of another nation; for you are a holy people to the Lord your God. The young goat is not to be cooked in its mother's milk.

And Moses at his death was a hundred and twenty years old: his eye had not become clouded, or his natural force become feeble.