Brihat Parashara Hora Shastra
द्विराशीशस्य खेटस्य विदित्वोभयथा फलम् । विरोधे तुल्यफलयोर्द्वयोर्नाशः प्रजायते ॥ १४६॥
In the case of a Grah, owning two Bhavas, the results are to be deducted based on its two lordships.
english translation
dvirAzIzasya kheTasya viditvobhayathA phalam । virodhe tulyaphalayordvayornAzaH prajAyate ॥ 146॥
hk transliteration by Sanscript