Brihat Parashara Hora Shastra
चत्वारिंशद्विभागानामधिपा विषमे क्रियात्। समभे तुलतो ज्ञेयाः स्वस्वाधिपसमन्विताः॥ २९॥
Khavedāńś (or Chatvarimshāńś, 1/40th part of a Rāśi). For odd Rāśis count from Mesh and for an even Rāśi from Tula in respect of Khavedāńśas (each of 45‟ of arc).
english translation
catvAriMzadvibhAgAnAmadhipA viSame kriyAt। samabhe tulato jJeyAH svasvAdhipasamanvitAH॥ 29॥
hk transliteration by Sanscript