Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 5 · Portents, Comets
ग्रहचारः केतवश्च
क्षेमाद्यं वृष्टिभूपालजननाशः प्रजायते ।सत्याष्टनवमर्क्षेषु सोदयाद्वक्रिमे कुजे ॥ २७ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 27.
... welfare, rain, the king and the people may suffer harm, in that order. When Mars turns back in the 7th, 8th or 9th nakshatra (star), counted from where it rose ...
Simple meaning: Planets striking the Moon may harm welfare, rain, the king and the people, in that order.
तद्वक्रमुष्णसंज्ञं स्यात्प्रजापीडाग्निसंभवः ।
Mars turning back in the 7th to 9th star after rising brings trouble and fire.
कूक्रं वक्रमुखं ज्ञेयं सस्यवृष्टिविनाशकृत् ।
Mars turning back in the 10th to 12th star may harm crops and rain.
बालास्यचक्रं तत्तस्मिन्सस्यवृष्टिविनाशनम् ।
Mars turning back in the 13th or 14th star may harm crops and rain.