EARTH in OT usually stands for one or other of the Heb. words 'eretz and 'ad
In the beginning God created heaven and earth.
And God said, "Let the water bring forth creatures that move and have life, and fowls for to fly over the earth under the firmament of heaven."
Then the LORD God shope man, even of the mold of the earth, and breathed into his face the breath of life. So man was made a living soul.
O thou earth, earth, earth: hear the word of the LORD!