The Cattle - 6:87
And We chose many of their fathers and their descendants and their brothers and guided them to the right path.
Not all the descendants of the Prophets were on the right path:
Those Who Set The Ranks/37:113
We favored him and Isaac. Verily, from the descendants of both of them are those who do good and those who wrong.
The Iron/57:26
We sent Noah and Abraham and bestowed upon their descendants prophethood and the Book. Some of them found the truth, but most of them went astray.