Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
खार्णवः खरसैर्गुण्यो रुद्रैर्भागं समाहरेत् ।रसोहतं तु तत्कृत्वा पूर्वभागेन(ण) भाजयेत् ॥ ३ ॥
In the full Agni Purana this is chapter 123, verse 3.
Multiply 40 by 60. Divide by 11 and take that. Then multiply it by 6. Divide by the earlier part.
Simple meaning: This is a counting rule: multiply, divide, multiply again, then divide by the earlier part.
वह्निभिश्चाऽऽहतं कृत्वा रूपं तत्रैव निक्षिपेत् ।
Multiply by 3 and add 1. This counts the throbs of the breath and the small time units.
अनेनैव तु मानेन उदयन्ति दिने दिने ।
They rise day after day by the same measure. Three beats make a breath.
षष्टिभिश्च पलैर्लिप्ता लिप्ताषष्टिस्त्वहर्निशम् ।
Sixty palas make a lipta, and sixty liptas a day and night. Rising goes through five life stages.