The Ocean of Mantras

On the phallus, anus, head, mouth, nose, eyes, and all limbs,
One should place the Vajrajihvas adamantine tongues, endowed with their own seeds, ending in the dative case with Namah salutation. (133)
Hiranya, Gagana, Rakta, Krishna, Suprabha,
Bahurupa, and Atirakta are considered the tongues of fire. (134)
The seeds of the seven tongues are the letters beginning with 'sa' and the others, placed in reverse order upon the Dipika lamp, the fire, and the wind, along with the Bindu nasal dot. (135)
The deities of the tongues are the gods, manes, gandharvas, yakshas, nagas, pishachas,
And rakshasas; one should place them in their respective locations. (136)
In the placement and worship, the order for Bahurupa and Atirakta is reversed;
Atirakta should be placed on the eyes, and Bahurupa on all limbs. (137)
For the thousand-rayed one, the heart; for Svasti-purna full of well-being, the head;
"Utthistha Purusha" Arise, O Person, is declared to be the shikha-mantra tuft-mantra. (138)
At the end of "Dhuma," the vyapini pervasive power is the armor; for the seven tongues, the eyes;
"Astra" weapon is for the wielder of the bow; one should perform the six-fold ritual. (139)
On the head, left shoulder, side, hip, phallus, and hip again,
On the right side and shoulder, one should place the eight forms of the sun-god Vibhavasu Fire. (140)
Starting with the word Tara-agnaye Om to Fire, these end in the fourth case with Namah.

The term Nenta means ending in the fourth dative case (133-134).

One derives the tongue-seeds from the Dipika lamp-formula. The Dipika consists of the letters (U, A, Na, Li, Ra, Ya, etc.), and by reversing the letters starting from 'sa'—sa, sha, va, la, ra, ya—and adding the Bindu nasal dot, these become the seeds for the seven tongues, Hiranya, etc. Thus: Sum Hiranyaya Namah, Shum Gaganayai Namah, Shum Raktayai Namah, Vum Krishnayai Namah, Lyum Suprabhayai Namah, Rum Bahurupayai Namah, Yum Atiraktayai Namah. (135)

The deities of the tongues (gods, etc.) are to be placed in the positions of the tongues. The usage is: "To the gods, Namah," on the phallus, and so on. (136-137)

The head is the crown mantra. (138-140)