俱舍論記 20.64

20.64

「又應顯成至有必不滅」者，顯同外道過。雨時生故，以雨授名。是雨徒眾，故名雨眾，即數論師。汝執所立有無決定，又應顯成雨眾外道所黨邪論，彼說二十五諦有必常有，非諦攝者無必常無。無必不生，以無體故；有必不滅，以有體故。

"Moreover, it would clearly establish ... the existent must never perish": this shows the fault of being identical with the non-Buddhists. Because [the founder] was born during rain, he was given the name of Rain (Varṣā). His followers are therefore called the Rain-Host (Vārṣagaṇya), which refers to the Sāṃkhyas. Your insistence on fixed existence and non-existence would moreover clearly establish the false doctrine espoused by the Vārṣagaṇya non-Buddhists. They say that among the twenty-five principles (tattva), what exists must always exist, and what is not included among the principles is non-existent and must always be non-existent. The non-existent must never arise, because it lacks substantiality; the existent must never perish, because it possesses substantiality.