'Four Corners of the Earth' in the Bible

After this, I saw four angels standing 'upon the four corners of the earth,' restraining the four winds of the earth, that no wind should blow over the earth, or over the sea, or against any tree.

and he will come out to deceive the nations that live in 'the four corners of the earth--Gog and Magog.' He will come to gather them together for battle; and their number will be as great as the sand on the sea-shore.