俱舍論疏 18.25

18.25

「論曰至過此無限」，明處及人數。所以極少猶須九人。四人成眾，邪、正二眾合有八人，一人為佛，故九人也。餘洲無佛，豈得言我是佛？人不信也。頌中言等，顯過九人，其數無限。

[On the passage of the] treatise, "[The commentary] says ... beyond this there is no limit": This clarifies the location and the number of people. Why is it that, at the very minimum, nine people are still required? Four persons make a community; the two communities, false and right, together make eight people; one person serves as the Buddha; therefore there are nine people. In other continents there is no Buddha; how could one say 'I am the Buddha'? People would not believe it. The word 'and so forth' in the verse indicates that there can be more than nine persons, their number being limitless.