Brihat Parashara Hora Shastra
चतुरस्रं तुर्यरन्ध्रं कथयान्ते द्विजोत्तम। स्वस्थादुपचयर्क्षाणि त्रिषडायाम्बराणि हि॥ ३६॥
Chaturasras are Bandhu and Randhr Bhava. Sahaj, Ari, Karm and Labh Bhava are Upachaya Bhavas.
english translation
caturasraM turyarandhraM kathayAnte dvijottama। svasthAdupacayarkSANi triSaDAyAmbarANi hi॥ 36॥
hk transliteration by Sanscript