Brihat Parashara Hora Shastra
पक्षजं बलमिन्दुज्ञशुक्रेज्यानां तु षष्टितः । विशोध्य तब्दलं ज्ञेनं पापानां पक्षसंभवम् ॥ ११॥
which will indicate the Paksh Bal of each of the benefic Grahas. The Paksh Bal of benefic should be deducted from 60, which will go to each malefic, as Paksh Bal.
english translation
pakSajaM balamindujJazukrejyAnAM tu SaSTitaH । vizodhya tabdalaM jJenaM pApAnAM pakSasaMbhavam ॥ 11॥
hk transliteration by Sanscript