वृश्चिकस्य विषं पुच्छं मक्षिकस्य विषं शिरः ।
तक्षकस्य विषं दंष्ट्रा सर्वाङ्गं दुर्जने विषम् ॥

Meaning:
The poison of a scorpion is in it’s tail; the poison of a fly is in it’s head; the poison of a snake is in it’s fangs; the poison of a wicked person is in his whole body.