Brihat Parashara Hora Shastra
पुष्यभाज्जन्मभं यावद् या संख्या गजतष्टिता । रविर्भौमो गुरुर्मन्दः केतुश्चन्द्रो बुधो भृगुः ॥ २५॥
Count the number of Nakshatras from Pushya to the Janm Nakshatr. Divide this number by 8. The remainder will indicate the Dashas of Sūrya, Mangal, Guru, Śani, Ketu, Candr, Budh and Śukr.
english translation
puSyabhAjjanmabhaM yAvad yA saMkhyA gajataSTitA । ravirbhaumo gururmandaH ketuzcandro budho bhRguH ॥ 25॥
hk transliteration by Sanscript