'One' in the Bible

You have sown much, and bring in little. You eat, but you don't have enough. You drink, but you aren't filled with drink. You clothe yourselves, but no one is warm, and he who earns wages earns wages to put them into a bag with holes in it."

Then Haggai said, "If one who is unclean by reason of a dead body touch any of these, will it be unclean?" The priests answered, "It will be unclean."

Through all that time, when one came to a heap of twenty measures, there were only ten. When one came to the wine vat to draw out fifty, there were only twenty.