dust. Figure of speech Paroemia. In Genesis 15:5, as the "stars", marking the two parties in Israel: the earthly and heavenly (Hebrews 11:9-16); partakers of "the heavenly calling" (Hebrews 3:1).
Related Commentaries of Genesis 13:16
Genesis 13:16
16 And I will make thy seed as the dust of the earth: so that if a man can number the dust of the earth, then shall thy seed also be numbered.