唯識二十論述記 1.124

1.124

述曰：此解時定，夢境雖無實，即於此處，或於一時見村園等，非一切時皆恒見有。故於覺位，雖無實境，有時見彼終南山等，此識得生，非一切時定恒見有，此識得生，比量准前處中可解。

Commentary: This explains temporal determination. Although the dream object is unreal, right in this place, at a certain time one sees villages, gardens, and so forth, not seeing them constantly at all times. Therefore, in the waking state, although there is no real object, at a certain time seeing that Mount Zhongnan and so forth, this consciousness can arise, not being constantly seen at all times for this consciousness to arise. The inference can be understood by following that for place above.