Brihat Parashara Hora Shastra
आत्मकारकपुत्राभ्यां योगमेकं प्रकल्पयेत् । तनुपञ्चमनाथाभ्यां तथैव द्विजसत्तम ॥ ४॥
On the one hand the pair of Atma Karak and Putr Karak should be considered and on the other hand the natal Lagn‟s Lord and Putr‟s Lord should be taken into consideration.
english translation
AtmakArakaputrAbhyAM yogamekaM prakalpayet । tanupaJcamanAthAbhyAM tathaiva dvijasattama ॥ 4॥
hk transliteration by Sanscript