Phaladeepika
स्वोच्चस्वर्क्षसुहृद्गृहेषु बलिनः षट्सु स्ववर्गेषु वा प्रोक्तं स्थानबलं चतुअयमुखात्पूर्णार्द्धपादाः क्रमात् । मध्याद्यन्तकषण्डमर्त्यवनिताः खेटा बलिआः क्रमात् मन्दारज्ञगुरूशनोब्जरवयो नैजे बले वर्द्धनाः ॥ ३॥
The strength accruing to a planet in the six Vargas (viz, Rasi, Hora, Drekkana, Navamsa, Dwadasamsa and Trimsamsa) on a consideration of its being posited in its exaltation, its own and its friendly signs, etc., is termed its positional strength. That aris ing from its being in Kendra and other Bhavas (i.e., Phanapara and Apoklima) will be 1, and Rupa respectively. The hermaphrodite planets are strong in the middle, the male ones at the initial and the female ones at the concluding portions of a Rasi. Saturn, Mars, Mercury, Jupiter, Venus, the Moon and the Sun are in their order increasing in their natural strength.
english translation
svoccasvarkSasuhRdgRheSu balinaH SaTsu svavargeSu vA proktaM sthAnabalaM catuayamukhAtpUrNArddhapAdAH kramAt । madhyAdyantakaSaNDamartyavanitAH kheTA baliAH kramAt mandArajJagurUzanobjaravayo naije bale varddhanAH ॥ 3॥
hk transliteration by Sanscript