'Four' in the Bible

Once again I looked and this time I saw four horns.

Next the Lord showed me four blacksmiths.

"You there! Flee from the northland!" says the Lord, "for like the four winds of heaven I have scattered you," says the Lord.

Once more I looked, and this time I saw four chariots emerging from between two mountains of bronze.

The messenger replied, "These are the four spirits of heaven that have been presenting themselves before the Lord of all the earth.