'Someone' in the Bible

Every male among you, from one generation to another, is to undergo circumcision when he is eight days old, with every servant whose birth takes place in your house, or for whom you gave money to someone of another country, and not of your seed.

Then Pharaoh got up in the night, he and all his servants and all the Egyptians; and a great cry went up from Egypt; for there was not a house where someone was not dead.

Or anyone touching any unclean thing which goes flat on the earth, or someone by whom he may be made unclean in any way whatever;

And David, moved by a strong desire, said, If only someone would give me a drink of water from the water-hole of Beth-lehem, by the doorway into the town!

And someone went and said to his lord, This is what the girl from the land of Israel says.

And David, moved by a strong desire, said, If only someone would give me a drink of the water from the water-hole of Beth-lehem by the doorway into the town!