Hayanaratna · by Balabhadra
Chapter 2 · Aspects, Strength, Results
दृष्टिसाङ्गबलेष्टकष्टाद्यानयनाधिकारः
मेषमृगतुलाकर्कमुखाःस्युर्नवमांशकाः ॥मेषकेसरिधन्वादिराशिचक्रे व्यवस्थिताः ॥ ९ ॥
The navamsha (one-ninth parts of a sign) begin from Aries, Capricorn, Libra and Cancer. They are set in the sign chakra (wheel) of Aries, Leo, Sagittarius and the rest.
Simple meaning: Ninth parts begin from Aries, Capricorn, Libra and Cancer.
अजकुम्भधनुस्तौलिसिंहयुग्मक्रमेण तु ॥
Tenth parts: the lords follow the order Aries, Aquarius, Sagittarius, Libra, Leo, Gemini.
मेषमीनघटानक्रचापालितुलकन्यकाः ॥
Eleventh parts: the lords run backwards from Aries through Pisces, Aquarius, Capricorn and on to Cancer.
स्वस्वराश्यादिका ज्ञेया द्वादशांशकनायकाः ॥ १२ ॥
Twelfth parts start from the sign itself. This is how the twelve vargas are known for the lagna.