法華論疏 1.60

1.60

As for "Vulture Peak surpasses all mountains": the country of Magadha has five mountains, and among the five mountains, Vulture Peak is the most supreme.
Question: Texts such as the Daśabhūmika Sūtra explain ten jewel mountains; why is Vulture Peak alone taken as surpassing all?
Answer: Vulture Peak is the place where all Buddhas of the three periods of time constantly dwell, whereas other mountains are not like this; therefore, it is specifically stated to be supreme.
Question: What is meant by the meaning of "sovereignty"?
Answer: Having explained the Buddha Vehicle, the Buddha is sovereign. Furthermore, other sūtras clarify meaning only according to their specific teachings, whereas this sūtra concludes, harmonizes, and unifies the beginning and end of a single period of conversion, manifesting and drawing all back in; hence, it is called "sovereign."
Question: In the section headings, it explained: first, the meaning of supremacy; second, the meaning of sovereignty. Now in distinguishing the city and the mountain, both represent the meaning of supremacy. How do they represent sovereignty?
Answer: Precisely because of these two supremacies, it is sovereign. Alternatively, the royal city takes the sense of sovereignty, while the mountain takes its supremacy.