Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
त्रयोदश्यादिचत्वारि सप्तम्यादिदिनत्रयम् ।चतुर्थी वा शुभाः प्रोक्ता अष्टावेते गलग्रहाः ॥ ३७९ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 379.
The four from the 13th, the three from the 7th, and the 4th are said to be bad. These eight are the galagrahas (bad days).
Simple meaning: The 13th to the 1st, the 7th to 9th, and the 4th are the eight bad days.
क्षुरिकाबंधनं वक्ष्ये नृपाणां प्राक्करग्रहात् ।
Kings tie on the dagger before marriage, in marriage months and the bright half.
जीवे शुक्रे च भूपुत्रे चंद्रताराबलान्विते ।
Jupiter, Venus and Mars not set, Moon and star strength, thread-rite days, and any day but Tuesday.
नचेन्नवांशके कर्तुरष्टमोदयवर्जिते ।
Avoid a rising sign 8th from the birth sign. Keep the 8th clean. Keep the Moon out of 6, 8, 12.