阿彌陀經通贊疏 2.116

2.116

贊曰：第二辨聽眾功德。文分為四：初、小大兩眾算數無邊；二、新舊二徒因行有異；三、勸生彼國；四、勸生利益。此初分二：初辨眾多少、二結成莊嚴。此初也。聲聞弟子者，因聲悟道，故曰聲聞。弟子者，長在我後名弟，解從我生名子。皆阿羅漢者，揀前三果故也。非算數之所知者，算數之不及故。菩薩亦如是者，亦同聲聞算之不及。

The commentary states: The second [section] distinguishes the merits of the listening assembly. The text is divided into four: first, the numbers of both the lesser and greater assemblies are boundless; second, the causal practices of both new and old followers differ; third, an exhortation to be born in that land; fourth, the benefits of being exhorted to rebirth. This first [section] is divided into two: first, distinguishing the quantity of the assembly; second, concluding that it forms an adornment. This is the first. Regarding 'śrāvaka disciples': because they awaken to the Path by means of sound, they are called 'śrāvakas' (sound-hearers). 'Disciples' (dizi): being elder, I am behind, hence called 'younger brother' (di); understanding is born from me, hence called 'son' (zi). 'All of whom are arhats' excludes the prior three fruits. 'Beyond what can be known by calculation' means that reckoning and counting cannot reach them. 'The bodhisattvas are likewise thus' means that, like the śrāvakas, calculation cannot reach them either.