Phaladeepika
बलपिंड सार्द्धानि षशतीक्ष्णकरो बलीयान् चन्द्रस्तु षशपञ्च वसुन्धराजः सप्तेन्दुसूनो रविवद्गुरोस्तु सार्द्धानि पञ्चाथ सितो बली स्यात् ॥ २२॥
The Sun is declared strong when his strength is 6 Rupas. In the case of the Moon, it is 6 Rupas. Five Rupas are assigned to Mars and 7 to Mercury Jupiter's Purnabala is similar to that of the Sun, that is, 6 1/2 Rupas. Venus is strong when he gets 5 1/2 Rupas.
english translation
balapiMDa sArddhAni SazatIkSNakaro balIyAn candrastu SazapaJca vasundharAjaH saptendusUno ravivadgurostu sArddhAni paJcAtha sito balI syAt ॥ 22॥
hk transliteration by Sanscript