法界次第初門 1.120

1.120

二、眾生。於名、色、陰、入、界等法和合中，妄計有我生，故名眾生。

Second is the sentient being (sattva). In the combination of dharmas such as nāmarūpa, the skandhas, āyatanas, and dhātus, one falsely imputes that a self is born; therefore it is named sentient being.