Brihat Parashara Hora Shastra
लग्नेशतद्गतर्क्षेशतद्गतर्क्षेशतदंशपाः । केन्द्रे कोणे स्वतुङ्गे वा योगः कल्पद्रुमो मतः ॥ ३३॥
Kalpa Drum Yog. Note the following four Grahas: Lagn‟s Lord , the dispositor of Lagn‟s Lord (a), the dispositor of the Grah “a” (b), the Navāńś dispositor of the Grah “b”. If all these are disposed in Kendras and in Konas from Lagn, or are exalted, Kalpa Drum Yog exists.
english translation
lagnezatadgatarkSezatadgatarkSezatadaMzapAH । kendre koNe svatuGge vA yogaH kalpadrumo mataH ॥ 33॥
hk transliteration by Sanscript