Milarepa said:

Harmless beasts you slay and eat;
You make and taste a drink to make you drunk
And lay the cause for the Reviving Hell.
Oh, do not jump into the gulf with open eyes.
Take care, you gods and humankind, take care!
When pricked by thorns, you cannot bear the pain,
And yet you kill and eat the flesh of living beings.
How harsh will be the prickles of Reviving Hell,
When skin will be flayed from your burning limbs!
So take away your dreadful blood-red meat.
Here it is, unspoiled and quite untouched;
Take it now and use it as you wish!

(Source: FB, p. 81)