瑜伽論記 12.284

12.284

言淨不淨果不平等因，與上相違是名非處者，自在天不平等因非生果處。遠離一切增上慢智，說名如實者，世尊遠離未得謂得增上慢智，故名如實，此即釋上諸有所說一切如實故名如來。

Regarding 'the non-equanimous cause of pure and impure fruits, contrary to the above, is called the impossible': the non-equanimous cause of Īśvara is not the place from which fruits arise. Regarding 'the knowledge that is far removed from all haughty presumption is called "as it truly is"': the World-Honoured One is far removed from the haughty presumption of thinking one has attained what has not been attained, hence it is called 'as it truly is'; this explains the above statement that all which is spoken is entirely as it truly is, hence he is called 'Tathāgata.'