The following is respectfully quoted from “Perfect Conduct” with commentary by Dudjom Rinpoche:
4.b.3(b.10) Failing to liberate if the ten prerequisites are met:
The tenth is failing to liberate or express love when there is potential and when the ten prerequisites are complete.
The word of honor concerns that which brings harm to the doctrine, namely the physical enemies of the Three Jewels and more specifically the physical enemies of own’s own lama, those who have failed to restore deteriorated words of honor, those who have embraced the view and conduct of mantra and who have then developed incorrect view or have rejected the view and conduct, those who have hatred or anger toward the lama or the vajra family, those who have entered the secrete teachings without authorization, those who have brought harm to sentient beings or who are harming pure upholders of samaya, and those who continue to accumulate extremely negative karma. Such individuals qualify as objects of liberation through profound compassion. Any one of these nine causes for suffering must be present, along with the fact that these individuals wills surely fall to the three lower realms and experience unendurable suffering as a result of their conduct. Including the point that the results of their negative karma will surely be fatal constitutes the ten prerequisites. If any of these ten are complete, and especially if the potential to liberate exists, failure to accomplish this constitutes the tenth downfall.
