Phaladeepika
दशांशषष्ट्यंशकलांशहीनास्ते सप्तवर्गाश्च विसप्तमांशाः षड्वर्गसंज्ञास्त्वथ राशिभावतुल्यं नवांशस्य फलं हि केचित् ॥ २॥
From the aforesaid ten Vargas if we omit the Dasamsa, Shashtyamsa and Kalamsa, the remaining 7 kinds of divisions are known as Saptavargas. If from this we exclude the Saptamsa the remaining 6 kinds of division are known as Shadvargas. Some are of opinion that the effect emanating from a Navamsa is similar (or equal) to that of the Rasi and Bhava.
english translation
dazAMzaSaSTyaMzakalAMzahInAste saptavargAzca visaptamAMzAH SaDvargasaMjJAstvatha rAzibhAvatulyaM navAMzasya phalaM hi kecit ॥ 2॥
hk transliteration by Sanscript