Brihat Parashara Hora Shastra
सर्वार्धत्रिचतुःपञ्चषष्ठभागं क्रमाद् ग्रहः । व्ययाद्वामं स्थितः पापो हरेत् सौम्यश्च तद्दलम् ॥ १०॥
Deductions for Grahas in the Visible Half of the Zodiac. Full, half, one third, one fourth, one fifth and one sixth are the deductions of contributions, made by malefics, placed in the visible half of the zodiac.
english translation
sarvArdhatricatuHpaJcaSaSThabhAgaM kramAd grahaH । vyayAdvAmaM sthitaH pApo haret saumyazca taddalam ॥ 10॥
hk transliteration by Sanscript