Surya Siddhanta
याम्योत्तराप्राच्यपरासाधनम् पूर्ववद् दिशाम् । प्राग् इन्दोर् ग्रहणम् पश्चान् मोक्षो +अर्कस्य विपर्ययात् ॥
(In these circles determine the north and south, and the east and west lines[1] as mentioned before (in the 3rd Chapter). In a lunar eclipse, the obscuration first begins to the east and it ends to the west, (but) in a solar one the reverse of this takes place. (Therefore in the projection of the lunar eclipse, the valaná is to be marked as sine to the eastern or western side of the outer circle above described according as it is found at the beginning or end of the eclipse, but in the projection of the solar eclipse, the valaná found at the beginning or the end of the eclipse is to be marked to the western or eastern side of the circle respectively.) [1. It is evident that these lines will represent the circle of position, and the secondary to it passes through the body which is to be eclipsed. B. D.]
english translation
yAmyottarAprAcyaparAsAdhanam pUrvavad dizAm । prAg indor grahaNam pazcAn mokSo +arkasya viparyayAt ॥
hk transliteration by Sanscript