Brihat Parashara Hora Shastra
तत एव दशा ग्राह्या क्रमाद् वोत्क्रमतो द्विजः । बलस्याऽत्र विचारे स्यादग्रहात् सग्रहो बली ॥ १६१॥
The Rāśi, which has a Grah, placed in it, is considered more powerful than the Rāśi without a Grah in it. If both are with Grahas in them, the one with more Grahas would be considered more powerful.
english translation
tata eva dazA grAhyA kramAd votkramato dvijaH । balasyA'tra vicAre syAdagrahAt sagraho balI ॥ 161॥
hk transliteration by Sanscript