大乘義章 8.19

8.19

次辨四有染淨之義。生有一種，唯染無淨，受生必是煩惱心故，餘通染淨。故《雜心》云「一染三有二。」言一染者，是生有也。三有二者，本、死及中，通染淨也。此乃局論凡夫二乘。若通菩薩願力受生，是則四有皆通染淨（此五門竟）。

Next is explaining the meaning of defilement and purity in the four states of existence. Existence at birth, as a category, is exclusively defiled and not pure, because taking birth necessarily involves an afflicted mind; the others encompass both defiled and pure. Thus the Saṃyuktābhidharmahṛdaya says: "One is defiled; three existences are twofold." "One is defiled" refers to existence at birth. "Three existences are twofold" means that basic, death, and intermediate existences encompass both defiled and pure. This is strictly speaking of ordinary beings and the two vehicles. If extended to the rebirth of bodhisattvas through the power of vows, then all four states of existence encompass both defiled and pure. (This completes the fifth gate.)