Brihat Parashara Hora Shastra
निर्बला न्यूनसंख्या वा बाधका नैव सम्मताः । तृतीये व्याधिकाः पापा यत्र मैत्रेय बाधकाः ॥ ४॥
If the Argala causing Grah is stronger than the obstructing one, the former will prevail. Or, if the number of Argalas are more than the obstructing Grahas, then also the Argala will prevail.
english translation
nirbalA nyUnasaMkhyA vA bAdhakA naiva sammatAH । tRtIye vyAdhikAH pApA yatra maitreya bAdhakAH ॥ 4॥
hk transliteration by Sanscript