Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 3 · Dashas, Yogas, Placements
जातकम् २
स्थिरस्थैर्मुसलं नाम द्विशरीणतैर्नलः ।भाला केंद्रस्थितैः सौम्यैः पापैस्सर्प उदाहृतः ॥ १९३ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 55, verse 193.
With the planets in fixed signs, the combination is named Musala. With the planets in dual signs, it is Nala. With good planets in the kendra (corner house) places, it is Mala. With bad planets there, it is called Sarpa.
Simple meaning: Planets in fixed, dual or corner places make Musala, Nala, Mala or Sarpa.
केदारोत्थः कृषिकरः शूले शूरोक्षतो धनः ।
Kedara makes a farmer, Shoola a brave but poor person, Yuga a heretic and Gola a poor one.
भूपवंद्यपदश्चक्रे समुद्रे नृपभोगयुक् ।
Chakra and Samudra bring honour and comfort. Ardhachandra gives a fine body, Chapa a happy, brave person.
मित्रोपकारकृच्छत्रे कूटे चानृतबंधराट् ।
Chhatra makes a helper of friends, Koota a liar, and Nauka a famous, happy person.