Brihat Parashara Hora Shastra
केन्द्रत्रयगतैः सौम्यैः पापैर्वा दलसंज्ञकौ । क्रमान्मालाभुजंगाख्यौ शुभाशुभफलप्रदौ ॥ ८॥
Maal and Sarpa Yogas. If 3 Kendras are occupied by benefics, Maal Yog is produced, while malefics so placed will cause Bhujang, or Sarpa Yog. These Yogas, respectively, produce benefic and malefic results.
english translation
kendratrayagataiH saumyaiH pApairvA dalasaMjJakau । kramAnmAlAbhujaMgAkhyau zubhAzubhaphalapradau ॥ 8॥
hk transliteration by Sanscript