Brihat Parashara Hora Shastra
कर्मेशे कर्मगे ज्ञेया चतुराशीतिका दशा । पवनाज्जन्मभं यावद् या सङ्ख्या सप्तभाजिता ॥ ३५॥
Chaturashiti-sama Dasha is considered appropriate in cases, where the Karm‟s Lord is placed in Karm. Count from Swati to the Janm Nakshatr and divide this number by 7.
english translation
karmeze karmage jJeyA caturAzItikA dazA । pavanAjjanmabhaM yAvad yA saGkhyA saptabhAjitA ॥ 35॥
hk transliteration by Sanscript