'Itself' in the Bible

"Tyre built itself a fortification, hoarding silver like dust and pure gold like mud in a street.

The land will mourn, every family by itself: the family of David’s house by itself and their women by themselves; the family of Nathan’s house by itself and their women by themselves;

the family of Levi’s house by itself and their women by themselves; the family of Shimei by itself and their women by themselves;

all the remaining families, every family by itself, and their women by themselves.