Surya Siddhanta
स्वपातोनाद् ग्रहाज् जीवा शीघ्राद् भृगुजसौम्ययोः। विक्षेपघ्न्य् अन्त्यकर्णाप्ता विक्षेपस् त्रिज्यया विधोः॥
(For the argument of latitude of each of the planets[1] Mars, Jupiter and Saturn) take its rectified node from its true place: but for (the argument of latitude of) Mercury or Venus take its rectified node from its Śíghrochcha; find the sine (of the argument of latitude of a planet); multiply it by the (greatest) latitude of the planet (mentioned in S'loka 70th of 1st Chapter) and divide the product by the 2nd hypothenuse found in the 4th operation; but in respect of the Moon divide it by the radius: the quotient will be the latitude (of the planet).
english translation
svapAtonAd grahAj jIvA zIghrAd bhRgujasaumyayoH। vikSepaghny antyakarNAptA vikSepas trijyayA vidhoH॥
hk transliteration by Sanscript