Brihat Parashara Hora Shastra
पापयोगेन तौ पापक्षेत्रयोगेन वा पुनः। उत्पाट्य सहजान् सद्यो निहन्तरौ न संशयः॥ ३॥
Destruction at once of co-born will come to pass, if the said 2 Grahas are together with a malefic, or in a Rāśi, owned by a malefic.
english translation
pApayogena tau pApakSetrayogena vA punaH। utpATya sahajAn sadyo nihantarau na saMzayaH॥ 3॥
hk transliteration by Sanscript