法華論疏 1.60

1.60

鷲山勝一切山者，摩伽陀國有五山，於五山中鷲山最勝也。問：如《十地》等經明十寶山，云何乃取鷲山勝一切耶？答：鷲山是三世諸佛常所住處，餘山不爾，故偏言勝。問：云何是自在義耶？答：既明佛乘，佛即自在。又餘經當教明義，此經結束融會一化始終出生收入，故言自在。問：章門中明，一勝義、二自在義；今辨城山竝是勝義。云何是自在耶？答：即此二勝故是自在。又王城取自在，山取其勝也。

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.