Brihat Parashara Hora Shastra
लग्नादष्टमगे चन्द्रे चन्द्रादष्टमगे गुरौ । पापग्रहैर्युते दृष्टे परजातो न संशयः ॥ १५॥
Undoubtedly the native is born of other‟s loins, if Candr is in the 8th from Lagn, while Guru is in the 8th from Candr. Malefic‟s Drishti, or Yuti is essential in this Yog.
english translation
lagnAdaSTamage candre candrAdaSTamage gurau । pApagrahairyute dRSTe parajAto na saMzayaH ॥ 15॥
hk transliteration by Sanscript