Abraham & his "children"

And he brought him forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed be. Genesis 15:5 And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise. Galatians 3:29 After this I beheld, and, lo, a great multitude, which no man could number, of all nations, and kindreds, and people, and tongues, stood before the throne, and before the Lamb, clothed with white robes, and palms in their hands; Revelation 7:9