Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
पूर्वात्रयं मघाह्यग्निविशाखाय ममूलभम् ।अधोमुखं तु नवकं भानौ तत्र विधीयते ॥ १७१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 171.
The three Purvas, Magha, Ahi's and Agni's stars, Vishakha, Yama's star and Mula: these nine stars face downward. In them the following is done.
Simple meaning: Nine stars face downward. The next verse names the work to do in them.
बिलप्रवेशगणितभूतसाधनलेखनम् ।
Downward stars suit digging, wells, writing, counting and craft work.
मित्रेन्दुत्वाष्ट्रहस्तेन्द्रादितिभांत्याश्विवायुभम् ।
Nine stars face sideways. The next verse names the work to do in them.
हलप्रवाहगमनं गंत्रीपत्रगजोष्ट्रकम् ।
Sideways stars suit ploughing, travel, carts, boats and work with animals.