Agni Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Name Letters and Chakras
युद्धजयार्णवः (चक्राणि)
तवर्गे ऋषयः प्रोक्ताः पवर्गे राक्षसाः स्मृताः ।पिशाचाश्च यवर्गे च शवर्गे मानुषाः स्मृताः ॥ ११ ॥
In the full Agni Purana this is chapter 132, verse 11.
The sages are said to be in the soft ta-group. The Rakshasas (demons) are in the pa-group. The Pishachas (goblins) are in the ya-group. The humans are said to be in the sha-group.
Simple meaning: The next letter groups belong to sages, demons, goblins and humans.
देवेभ्यो बलिनो दैत्या दैत्येभ्यः पन्नगास्तथा ।
Each kind of being in the list is stronger than the one before. The sages are above the Gandharvas.
ऋषिभ्यो राक्षसाः शूरा राक्षसेभ्यः पिशाचकाः ।
Each group is stronger than the one before. A strong one should avoid a weak one.
पुनर्मैत्रविभागं तु ताराचक्रं क्रमाच्छृणु ।
Now a wheel to find friends is told. Take the star of the first letter of the name.