Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 2 · War Astrology: Yogas, Nakshatras
युद्धजयार्णवः (योगाः नक्षत्राणि)
कादिहान्ता भौमरवी ज्ञसोमौ गुरुभार्गवौ ।शनिर्दक्षिणनाड्यां तु भौमार्कशनयः परे ॥ २ ॥
In the full Agni Purana this is chapter 123, verse 2.
The letters ka to ha go to Mars and the Sun, Mercury and the Moon, Jupiter and Venus, and Saturn. Mars, the Sun and Saturn are in the right breath. The others are in the left.
Simple meaning: The consonants are shared among the planets. Mars, the Sun and Saturn go with the right breath.
खार्णवः खरसैर्गुण्यो रुद्रैर्भागं समाहरेत् ।
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.