This speaks about the number of Isaac's descendants as if they were the same as the number of stars. See how you translated this in [Genesis 22:17](../22/17.md). (See: [[rc://en/ta/man/translate/figs-simile]])
This can be stated in active form. Alternate translation: "I will bless all the nations of the earth" (See: [[rc://en/ta/man/translate/figs-activepassive]])