Brihat Parashara Hora Shastra
ओजलग्नप्रसूतानां मेषादेर्गणयेत् क्रमात्। समलग्नप्रसूतानाम् मीनादेरपसव्यतः॥ ११॥
If the natal Lagn is an even Rāśi, count from Meen to the natal Lagn in the reverse order. Similarly, if the Hora Lagn is an odd one, count from Mesh to Hora Lagn in direct order. If the Hora Lagn is an even one, count from Meen to Hora Lagn in the reverse order.
english translation
ojalagnaprasUtAnAM meSAdergaNayet kramAt। samalagnaprasUtAnAm mInAderapasavyataH॥ 11॥
hk transliteration by Sanscript