תהילים קמז:טז מדרש: Pirkei DeRabbi Eliezer

Whence was the earth created? He took of the snow (or ice) which was beneath His Throne of Glory and threw it upon the waters, and the waters became congealed so that the dust of the earth was formed, as it is said, "He saith to the snow, Be thou earth" (Job 37:6).