Surya Siddhanta
स्थित्यर्धनाडिकाभ्यस्ता गतयः षष्ठिभाजिताः। लिप्तादि प्रग्रहे शोध्यम् मोक्षे देयम् पुनः पुनः॥
The diurnal motions (of the Sun, the Moon and her ascending node) multiplied by the Sthityardha (above found) in ghaṭikás and divided by 60 give their changes in minutes. Then to find the first exact Sthityardha, subtract the changes of the Sun and the Moon from their places and add the node's change to its place; from these applied places find the Moon's latitude and the Sthityardha. This Sthityardha will be somewhat nearer the exact one, from this find the changes and apply the same mode of calculation (as mentioned before) and repeat the process until you get the same Sthityardha in every repetition.
english translation
sthityardhanADikAbhyastA gatayaH SaSThibhAjitAH। liptAdi pragrahe zodhyam mokSe deyam punaH punaH॥
hk transliteration by Sanscript