Hayanaratna · by Balabhadra
Chapter 4 · The Sahamas
सहमाध्यायः
ग्रहज्ञाभरणेप्युक्तम् ॥दिवसे भानुभोग्यांशानिन्दुभुक्तांश्च मेलयेत् ॥तदन्तरालराश्यंशयुताल्लग्नन्तदन्तरे ॥
It is also said in the Grahajnabharana. By day, join the Sun's degrees still to travel and the Moon's travelled degrees. From the total, joined with the degrees of the signs between them, check whether the lagna (rising sign) is within them...
Simple meaning: Grahajnabharana: by day join the Sun's degrees left and the Moon's degrees gone, plus the signs between. Then check where the lagna is.
यदि न स्यात्तदा क्षेप्या भुक्तांशा अस्य मध्यगे ॥
If the lagna is outside, add its degrees gone. If it is inside, subtract its degrees left. Then subtract 30 per sign from the 2nd house.
स्वात् द्वितीयभवनात् ॥
The word 'svat': it means counting from the 2nd house.
येषु नोक्ता पृथक् शुद्धिस्तेषु कार्या धनादित इति ॥
Sahamas with no stated rule: count from the 2nd house.