commentator on the Lankavatara-sutra, the Acharya Jnanashribhadra
from India, has written as follows:
The Omniscient One has declared that to eat meat and to encourage
others to eat meat is an evil act because it causes harm to beings.
The Buddha forbade the consumption of all meat that is not pure
in the three ways, but he did not consider it wrong to partake of
meat that is so. Meat that is completely pure in the three ways
is the flesh of animals that one has not killed, that one has not
ordered to be killed, and that one has not seen to be killed. If
without evil intentions and expectancy one donates such meat to
someone, just as if one were giving them rice to eat, it is quite
pure and as beneficial as medicine.
But even this kind of meat is forbidden to Bodhisattvas, who practice
compassion. Most especially it is forbidden to the practitioners
of the Mantrayana. For they are bound to respect beings and consider
them indeed as yidam deites. Only when one rids oneself
of every craving for the taste of sense objects is liberation gained.
FB. p. 75)