Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
अनुक्तानां च सर्वेषां घोराद्याः सुखदाः स्मृताः ।पूर्वाह्णे नृपतीन्हन्ति विप्रान्मध्यंदिने विशः ॥ २५२ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 252.
... and all those not named. Ghora and the rest are said to give happiness. The Sun's sankranti (the Sun's entry into a sign) in the forenoon may harm kings. At midday, Brahmins.
Simple meaning: A Sun sign change in the forenoon is bad for kings. At midday it is bad for Brahmins.
अपराह्णेऽस्तगे शूद्रान्प्रदोषे च पिशाचकान् ।
In the afternoon it may harm Vaishyas, at sunset Shudras, then goblins, night-wanderers and actors.
गोपानुषसि संध्यायां लिंगिनो रविसंक्रमः ।
At dawn it may harm cowherds, at twilight ascetics. Aries entry by day can bring trouble and fights.
रात्रौ सुभिक्षमतुलं संध्ययोर्वृष्टिनाशनम् ।
Sun's entry at night brings plenty, at twilight it may hold back rain. Each karana gives the Sun's entry an animal mount.