Astanga Hrudaya
जिह्वाक्षिनासिकाश्रोत्रखचतुष्टयसङ्गमे। तालुन्यास्यानि चत्वारि स्रोतसां, तेषु मर्मसु॥३४॥
At the meeting place of four orifices of the tongue, eyes, nose, and ears, and in the palate and oral cavity where the four channels related to tongue etc.
english translation