'Eighty' in the Bible

So Moab was subdued and humbled that day under the hand of Israel, and the land was at rest for eighty years.

Barzillai was a very old man, eighty years old; and he had provided the king with food while he stayed at Mahanaim, for he was a very great and wealthy man.

I am this day eighty years old. Can I [be useful to advise you to] discern between good and bad? Can your servant taste what I eat or drink? Can I still hear the voices of singing men and women? Why then should your servant be an added burden to my lord the king?

And Elijah was afraid and arose and ran for his life, and he came to Beersheba which belongs to Judah, and he left his servant there.

Now there was a great famine in Samaria; and they besieged it until a donkey’s head was sold for eighty shekels of silver, and a fourth of a kab of dove’s dung for five shekels of silver.

Then they went in to offer sacrifices and burnt offerings.Now Jehu had stationed eighty men outside for himself and said, “If any of the men whom I have brought into your hands escape, the one who lets him go shall forfeit his own life for that man’s life.”

Then Azariah the priest went in after him, and with him eighty priests of the Lord, men of courage.

The days of our life are seventy years—Or even, if because of strength, eighty years;Yet their pride [in additional years] is only labor and sorrow,For it is soon gone and we fly away.

“There are sixty queens and eighty concubines,And maidens without number;

that eighty men came from Shechem, from Shiloh, and from Samaria with their beards shaved off and their clothes torn and their bodies cut, carrying in their hands grain offerings and incense to present at the [site of the] house of the Lord [in Jerusalem].

Then he said to another, ‘And how much do you owe?’ He said, ‘A hundred measures of wheat.’ He said to him, ‘Take your bill, and write eighty.’