Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
राक्षसाख्यौ ब्राह्मपित्र्यौ भर्गाजांशाविनादिषु ।वारेषु वर्जनीयास्ते मुहूर्ताः शुभकर्मसु ॥ २२८ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 228.
Then the two named Rakshasa, Brahma and Pitri (ancestors), and the Bharga and Aja parts. On Sunday and the other weekdays, in order, avoid these muhurtas (48 minutes) in good acts.
Simple meaning: Each weekday has one or two bad muhurtas. Skip them for good acts.
येषु ऋक्षेषु यत्कर्म कथितं निखिलं च तत् ।
An act told for a star can also be done in the hour of that star's god.
भूकंपः सूर्यभात्सप्तमर्क्षे विद्युच्च पंचमे ।
Counting from the Sun's star, some stars carry bad omen names: Earthquake, Lightning, Spear and Thunderbolt.
केतुः पंचदशे दंड उल्का एकोनविंशतौ ।
Counting on: Ketu is the 18th, Danda the 15th, Ulka the 19th, Nirghatapata the 14th.