'Eighty' in the Bible

There was a great famine in Samaria. Behold, they besieged it, until a donkey's head was sold for eighty pieces of silver, and the fourth part of a kab of dove's dung for five pieces of silver.

They went in to offer sacrifices and burnt offerings. Now Jehu had appointed him eighty men outside, and said, "If any of the men whom I bring into your hands escape, [he who lets him go], his life shall be for the life of him."