Phaladeepika
सर्वकर्मफलोपेतमष्टवर्गकमुच्यते । अन्यथा बलविज्ञानं दुर्ज्ञेयं गुणदोषजम् ॥ ३६॥
The Ashtakavarga system is declared to be effective in all undertakings. There is no other way to determine the power of the influence arising at the time--whether good or bad.
english translation
sarvakarmaphalopetamaSTavargakamucyate । anyathA balavijJAnaM durjJeyaM guNadoSajam ॥ 36॥
hk transliteration by Sanscript