瑜伽論記 2.293

2.293

現在新業由不作因之所害故者，謂宿惡業苦行便吐，現新惡業由不作因之所害令不起，二業既盡後無有漏。無繫外道者，則尼健陀弗怛羅，成唯識云：無慚外道離繫子也。露形苦行離諸繫縛，外形既爾表內亦然。

Regarding "present new karma is destroyed by the cause of non-performance": This means that past bad karma is purged through ascetic practices, and present new bad karma is destroyed by the cause of non-performance so that it is not produced; both karmas being exhausted, there are subsequently no taints. "The Nirgrantha non-Buddhists" refers to the Nirgrantha-putras. The Cheng weishi lun says: "The shameless non-Buddhists, the sons of the Nirgranthas." Practicing naked asceticism, they are free from all ties; their external form being thus, it signifies that the internal is likewise.