Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Name Letters and Chakras
युद्धजयार्णवः (चक्राणि)
मृत्युंजयं प्रवक्ष्यामि नामसंस्कारमध्यगम् ।+कलाभिवेष्टितं पश्चात्सकारेण निबोधितम् ॥ ३८ ॥
In the full Agni Purana this is chapter 133, verse 38.
I will tell the Mrityunjaya yantra (drawn figure), with the name set in its middle. Then it is ringed with the kalas (vowel letters). It is awakened with the letter sa.
Simple meaning: Next comes the Mrityunjaya figure, with the name in the middle, awakened by the letter sa.
जकारं विन्दुसंयुक्तमोंकारेण समन्वितम् ।
Write ja with a dot and Om inside the letter dha, and awaken it with va.
चन्द्रसंपुटमध्यस्थं सर्वदुष्टविमर्दकम् ।
This figure inside a moon-shaped ring crushes evil. Or write the name and the purpose in the centre.
पूर्वे दले तथोंकारं स्वदक्षे चोत्तरे लिखेत् ।
Write Om on the east petal, Hum on the next petals and the vowels on the sixteen petals.