俱舍論疏 6.150

6.150

論「毘婆沙師至名異熟因」，引《婆沙》釋對餘五因廢立名也。准此廢立熟名，通六因所得果時皆名熟也。此異熟因，唯異類熟得異熟名。自餘之因非唯異類，不名異熟。

The treatise says: "The masters of the *Vibhāṣā* [...] is called the maturation cause." This cites the *Vibhāṣā* to explain the rationale for designating this name in contrast to the other five causes. According to this rationale, the name "maturation" (vipāka) extends generally to the time when fruits obtained from all six causes are matured, which are all called "maturation." But this maturation cause alone is called "maturation" (vipāka) in the sense of maturing into a different class (vijātīya). The other causes do not mature solely into a different class, so they are not called "maturation".