Brihat Parashara Hora Shastra
उक्ता ये मारकास्तेषु प्रबलो मुख्यमारकः । तदवस्थानुसारेण मृतिं वा कष्टमादिशेत् ॥ २१॥
Thus these are Marakas and are primarily related to bring death upon the native. According to their dispositions there may be death, or difficulties.
english translation
uktA ye mArakAsteSu prabalo mukhyamArakaH । tadavasthAnusAreNa mRtiM vA kaSTamAdizet ॥ 21॥
hk transliteration by Sanscript