大方廣圓覺修多羅了義經略疏 1.209

1.209

二、明與凡聖同體者，既入其源，即同其體。故論云：「無漏無明種種業幻，皆同真如性相。」《華嚴》亦云：「心、佛及眾生，是三無差別。」

Second, explaining the identical essence with ordinary persons and sages: having entered its source, one is identical with its essence. Thus the treatise says: "The various karmic illusions of the undefiled and ignorance are all identical with the nature and marks of tathatā." The *Huayan* also says: "The mind, the Buddha, and sentient beings—these three are without difference."