'Four' in the Bible

And He will lift up a signal for the nationsAnd assemble the outcasts of Israel,And will gather the dispersed of JudahFrom the four corners of the earth.

“Yet gleanings will be left in the land [of Israel] like the shaking of the olive tree,Two or three olives on the topmost branch,Four or five on the [outermost] branches of the fruitful tree,”Declares the Lord, the God of Israel.