Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Name Letters and Chakras
युद्धजयार्णवः (चक्राणि)
तस्मिंश्चक्रे तु विज्ञेयं यो यस्माल्लभते फलम् ।षडूर्ध्वाः स्थापयेद्रेखा भिन्नाश्चाष्टौ तु तिर्यगाः(ग्गाः) ॥ २ ॥
In the full Agni Purana this is chapter 132, verse 2.
In that chakra, know who gets a result from whom. Set six lines upright, and eight lines slanting across, apart from each other.
Simple meaning: In this wheel you can tell who gains from whom. Draw six lines upright and eight lines across.
कोष्ठकाः पञ्चत्रिंशच्च तेषु वर्णान्समालिखेत् ।
The wheel has thirty-five squares. Five vowels and then the consonants are written in them.
ककारादिहकारान्तान्हीनाङ्गांस्त्रीन्विवर्जयेत् ।
Three imperfect letters are left out. The five classes are named Siddha, Sadhya, Susiddha, Ari and Mrityu.
+अरिर्मृत्युश्च द्वावेतौ वर्जयेत्सर्वकर्मसु ।
Avoid the Ari and Mrityu classes in all work. Check carefully which class the name falls in.