 we begin with the people of khorasan due to the large number of people in khorasan and we specifically mention the people of marv 1 as much as they were singled out for it
نبدأ بأهل خراسان ، لإكثار الناس في أهل خراسان، ونخص بذلك أهل مرو ١ ، بقدر ما خصوا به