'Dust of the Earth' in the Bible

And I will make thy seed as the dust of the earth, so that if any one can number the dust of the earth, thy seed also will be numbered.

And thy seed shall be as the dust of the earth, and thou shalt spread abroad to the west, and to the east, and to the north, and to the south; and in thee and in thy seed shall all the families of the earth be blessed.