Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
तदा दुर्भिक्षकलहरोगानावृष्टिभीतिकृत् ।हस्तादिषट्सु तारासु विचरन्निंदुनंदनः ॥ ४१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 41.
... then it brings famine, quarrels, illness, drought and fear. Mercury moving in the six stars from Hasta ...
Simple meaning: Mercury in the stars from Ardra to Magha brings famine, quarrels, illness and drought.
Classical view, not medical advice.
क्षेमं सुभिक्षमारोग्यं कुरुते रोगनाशनम् ।
Mercury in the six stars from Hasta brings welfare, food and health.
भिषक्तरंगवाणिज्यवृत्तीनां नाशकृत्तदा ।
Mercury in those stars may harm the work of doctors, seafarers and traders.
क्षुच्छस्त्रानलचौरेभ्यो भयदः प्राणिनां तदा ।
Mercury splitting a Purva star brings fear of hunger and thieves. Its path is natural in four stars.