'Eight' in the Bible

These are the names of the mighty ones whom David hath: sitting in the seat is the Tachmonite, head of the captains -- he is Adino, who hardened himself against eight hundred -- wounded at one time.

and Joab giveth the account of the inspection of the people unto the king, and Israel is eight hundred thousand men of valour, drawing sword, and the men of Judah five hundred thousand men.