Brihat Parashara Hora Shastra
लग्नादायोंऽशतुल्यः स्यादन्तरे चाऽनुपाततः । तत्पतौ बलसंयुक्ते राशितुल्यं च भाघिपे ॥ १५॥
If the Lagn‟s Lord in the Navāńś is stronger than Lagn‟s Lord, then the contribution should be computed only based on the number of Navāńśas gained (from Mesh), otherwise the computation will be for the Rāśi Lagn.
english translation
lagnAdAyoM'zatulyaH syAdantare cA'nupAtataH । tatpatau balasaMyukte rAzitulyaM ca bhAghipe ॥ 15॥
hk transliteration by Sanscript