Brihat Parashara Hora Shastra
रविवारादिशन्यन्तं गुलिकादि निरूप्यते। दिवसानष्टधा भक्त्वा वारेशाद् गणेयत् क्रमात्॥ ६६॥
Calculations of Gulik etc. The portions of Sūrya etc. up to Śani denote the periods of Gulik and others. Divide the day duration (of any week day) into eight equal parts. The eighth portion is Lord-less. The seven portions are distributed to the seven Grahas commencing from the Lord of the week day.
english translation
ravivArAdizanyantaM gulikAdi nirUpyate। divasAnaSTadhA bhaktvA vArezAd gaNeyat kramAt॥ 66॥
hk transliteration by Sanscript