瑜伽論記 5.96

5.96

又有二法，能令有情內正作意外聞他音等者，此內作意外聞他音，是二因緣由二法故，今此二因緣現入現觀，當諸根熟。於如來所說所有甚深經者，謂解深密等三性顯了教。相似甚深空相應經者，謂般若等與此甚深經相似。緣性者圓成實性，緣起者依他起性

Furthermore, regarding "there are two phenomena that can cause sentient beings internally to have correct attention and externally to hear the voices of others, and so on": these internal attention and external hearing of others' voices are two causes and conditions brought about by two phenomena; now, through these two causes and conditions, one enters into clear realization in the present, when the faculties have ripened. Regarding "all the profound sūtras spoken by the Tathāgata": this refers to the explicitly clear teachings on the three natures, such as the Sandhinirmocanasūtra. "Sūtras conjoined with emptiness that resemble the profound": this refers to the Prajñāpāramitā and others that resemble these profound sūtras. The nature of conditions is the pariniṣpanna-svabhāva; dependent arising is the paratantra-svabhāva.