Brihat Parashara Hora Shastra
दिग्बलं दिक्फलं तस्य तथा दिनफलं भवेत् । तयोः फलं शुभं प्रोक्तमशुभं षष्टितश्च्युतम् ॥ ११॥
Nature of Effects, due to Dig Bal etc. The directional strength of a Grah is itself representative of the effects, due to the direction; and Kaal Bal itself is indicative of effects, due to the day. Whatever quantum of Dig Bal etc. are obtained by a Grah, will be the extent of auspicious effects, acquirable on account of that strength. Deducting those figures from 60, the extent of inauspiciousness is known.
english translation
digbalaM dikphalaM tasya tathA dinaphalaM bhavet । tayoH phalaM zubhaM proktamazubhaM SaSTitazcyutam ॥ 11॥
hk transliteration by Sanscript