《太平广记·卷一百八十四·贡举七》
后来，凡是同张说家族结为姻亲的，都是学问有成的，被称为甲门四姓。
及后与张氏亲者，乃为甲门四姓。
Later on, all of those who became in-laws with the Zhang family of Zhang Shuo were accomplished scholars, and they were called the Four Families of the Great Houses.