大乘入道次第開決 1.167

1.167

餘二准知者。依他不以自然而生。以無自然生性為第二無性。是故名為生無自性性。圓成不以我諸為性。以是二空勝義理故。即以勝義無我法性為第三無性。名為勝義無自性性。

Regarding 'The remaining two should be understood by analogy': The dependent nature does not arise by nature; having no nature of natural arising is the second non-nature; therefore it is called the non-nature of arising. The consummate nature does not take the self or phenomena as its nature; because it is the ultimate principle of the two emptinesses, taking the ultimate selfless dharma-nature as the third non-nature, it is called the ultimate non-nature.