Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 8 · Marriage
विवाहः
चतुस्त्रिद्व्यंघ्रिभोत्थायाः कन्यायाश्चाश्विभात्क्रमात् ।वह्निभादिंदुभान्नाडीत्रिचतुःपंचपर्वसु ॥ ५०९ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 509.
Take a girl born in a star of four, three or two quarters. In that order, count from Ashvini, from Krittika, or from Mrigashira. The nadi (pulse group) runs in 3, 4 or 5 parts.
Simple meaning: The girl's star decides how the nadi is counted: in three, four or five parts.
गणयेत्संख्यया चैकनाड्यां मृत्युर्न पार्श्वयोः ।
The same nadi may put life at risk, not the two side ones. Four kinds of wedding are named.
उक्तकाले तु कर्तव्याश्चत्वारः फलदायकाः ।
The first four kinds of wedding need the right time. The other four can be done at any time.
चतुर्थमभिजिल्लग्नमुदयर्क्षाच्च सप्तमम् ।
The noon lagna and the dusk lagna both give sons and grandsons in a wedding.