What are the four corners of earth?

The Word translated "corners," as in the phrase above, is the Hebrew Word, KANAPH. Kanaph is translated in a variety of ways. However, it generally means extremity.

It is translated "borders" in Numbers 15:38. In Ezekiel 7:2 it is translated "four corners" and again in Isaiah 11:12 "four corners." Job 37:3 and 38:13 as "ends.

So in translation "corners" actually means "extremities" showing that it covers all the earth.