Brihat Parashara Hora Shastra
पदे तत्सप्तमे वापि केन्द्रे वृद्धौ त्रिकोणके । सुवीर्यः संस्थितः खेतः भार्याभर्तृसुखप्रदः ॥ ३३॥
If Lagn Pad and the 7 th therefrom, or an angle, a trine, an Upachaya therefrom is occupied by a strong Grah, there will be happiness between the husband and wife.
english translation
pade tatsaptame vApi kendre vRddhau trikoNake । suvIryaH saMsthitaH khetaH bhAryAbhartRsukhapradaH ॥ 33॥
hk transliteration by Sanscript