Brihat Parashara Hora Shastra
केन्द्रेशः कोणभावस्थः कोणेशः केन्द्रगो यदि । तयोर्दशां शुभां प्राहुर्ज्योतिःशास्त्रविदो जनाः ॥ १३॥
If the lord of an angular house (Kendresha) is situated in a trine house (Kona), and the lord of a trine house (Konesha) is situated in an angular house (Kendra), The learned scholars of astrology (Jyotish) declare the operating periods (Dashas) of both these planets to be highly auspicious (Shubha).
english translation
kendrezaH koNabhAvasthaH koNezaH kendrago yadi । tayordazAM zubhAM prAhurjyotiHzAstravido janAH ॥ 13॥
hk transliteration by Sanscript