TRANSLATION.
If you kill the first snake you see, you’ll kill the first (principal) enemy you have. That is what they say, but I don’t know whether it is true or not. And once there was a very bad man who was always doing bad deeds. And one day he saw a snake in the forest, and ran after it with a great knife in his hand and cut her head off. And then he said to himself, “Now that I’ve killed the snake, I’ll take the life of my most vindictive (literally, most venomous) enemy.” And just as he spoke that word he struck his foot against the roots of a tree, and fell down and drove the knife into his own body (liver or heart). And as he lay dying in the forests, he said to himself, “Yes, I see now that it is true what they told me as to killing a snake; for I never had any worse enemy than I have been to myself, and what comes of killing innocent animals is naught good.”