Genesis 13:16
I will make your offspring like the dust of the earth, so that if one could count the dust of the earth, then your offspring could be counted.
What it says
The LORD says Abram's offspring will be like the dust of the earth, beyond counting.
What it is doing
It enlarges the promise from land to innumerable descendants.
In context
14After Lot had departed, the LORD said to Abram, “Now lift up your eyes from the place where you are, and look to the north and south and east and west, 15for all the land that you see, I will give to you and your offspring forever. 16I will make your offspring like the dust of the earth, so that if one could count the dust of the earth, then your offspring could be counted. 17Get up and walk around the land, through its length and breadth, for I will give it to you.” 18So Abram moved his tent and went to live near the Oaks of Mamre at Hebron, where he built an altar to the LORD.