瑜伽論記 11.240

11.240

次觀三世諸行無常，由彼諸行無因可得，亦無自性者，明彼過去諸行無自體性，亦無能生因。

Next, in contemplating the impermanence of conditioned formations in the three times, 'because those conditioned formations have no obtainable cause and no intrinsic nature,' this clarifies that those past conditioned formations have no substantial nature and no productive cause.