Brihat Parashara Hora Shastra
क्रमादुत्क्रमतो वाऽपि धर्मभावपदक्रमात् । लग्नराशिं समारभ्य विज्ञश्चरदशां नयेत् ॥ १६७॥
If the Rāśi in Dharm Bhava is in an odd Pad, the counting should be from the Rāśi in the Lagn onwards. The counting would be in the reverse order, if the Pad is even. The Dashas of Rāśis have to be fixed, keeping this in view.
english translation
kramAdutkramato vA'pi dharmabhAvapadakramAt । lagnarAziM samArabhya vijJazcaradazAM nayet ॥ 167॥
hk transliteration by Sanscript