成唯識論了義燈 7.8

7.8

Furthermore, in the Saṃdhinirmocana Sūtra, Bodhisattva Paramārthasamudgata did not bring up the previously expounded three natures as his question, but merely cited the World-Honoured One's earlier teachings on skill regarding the aggregates, truths, and the like, asking why he again established that all dharmas are without self-nature. This clarifies that the three natures were not expounded earlier. Now an outsider cites the sūtra to object to the previous explanation here, so the author of the Śāstra answers that he does not contradict that teaching, having expounded naturelessness later.