Brihat Parashara Hora Shastra
यथा लग्ने सुखे कामे स्वोर्क्षोच्चस्था ग्रहा द्विज । भवन्ति कारकाख्यास्ते विशेषेण च खे स्थिताः ॥ २७॥
In Karm Bhava a Grah will be significantly so. Grahas simply (not being in friendly, own, or exaltation Rāśis) in Lagn, Bandhu and Yuvati Bhava do not become such Yog Karakas.
english translation
yathA lagne sukhe kAme svorkSoccasthA grahA dvija । bhavanti kArakAkhyAste vizeSeNa ca khe sthitAH ॥ 27॥
hk transliteration by Sanscript