Brihat Parashara Hora Shastra
त्र्यंशाढ्यविश्वभागैश्च चतुर्भैः सहितो रविः। धूमो नाम महादोषः सर्वकर्मविनाशकः॥ ६१॥
Non-luminous UpaGrahas (Sub-Grahas). Add 4 Rāśis 13 degrees and 20 minutes of arc to Sūrya‟s longitude at a given moment to get the exact position of the all inauspicious Dhoom.
english translation
tryaMzADhyavizvabhAgaizca caturbhaiH sahito raviH। dhUmo nAma mahAdoSaH sarvakarmavinAzakaH॥ 61॥
hk transliteration by Sanscript