首楞嚴義疏注經 2.128

2.128

若因佛說法生分別心，此分別心本無自性，故屬緣塵。隨塵有無，非是常住，但如其客。

If the discriminating mind arises because the Buddha expounds the Dharma, this discriminating mind originally lacks self-nature; therefore it belongs to conditioned dust. Following the presence or absence of the dust, it is not permanently abiding; it is merely like the guest.