Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
अथाद्वेशचमूनाथसस्यपानां बलाबलम् ।तत्कालं ग्रहचारं च सम्यग् ज्ञात्वा फलं पदेत् ॥ १२४ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 124.
Know well the strength and weakness of the year's lord, the army chief and the crop lord. Know also the planets' movement at that time. Then tell the result.
Simple meaning: Check the strength of the year's lord, army chief and crop lord, and the planets' movement. Then give the result.
सौम्यायनं मासषट्कं मृगाद्यं भानुभुक्तितः ।
The Sun's northward half-year starts at Capricorn and is the gods' day. The southward half starts at Cancer and is their night.
गृहप्रवेशवैवाहप्रतिष्ठामौंजिबंधनम् ।
House entry, marriage, installing a deity and the thread ceremony suit the Sun's northward half-year, from Magha.
याम्यायने गर्हितं च कर्म यत्नात्प्रशस्यते ।
In the Sun's southward half these acts are blamed, allowed only with great care. Each season lasts two months from Magha.