Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
स्वापोपविष्टास्तिष्ठंतस्ते लोकाः क्षेममाप्नुयुः ।अंधकं मंदसंज्ञं च मध्यसंज्ञं सुलोचनम् ॥ २६१ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 261.
Those people, lying down, seated or standing, find well-being. Andhaka, Manda, Madhya and Sulochana are the four classes of stars.
Simple meaning: People matching the Sun's pose fare well. Stars fall into four classes: blind, slow, middle, clear-eyed.
पपीयाद्गणयेद्भानि रोहिण्यादिचतुर्विधम् ।
Count the stars from Rohini in four kinds. The Sun's entry into a fixed sign is Vishnupada.
षडशीतिमुखा ज्ञेया द्विस्वभावेषु राशिषु ।
The Sun's entry into Libra and Aries is the equinox.
याम्यायने स्थिरे त्वाद्याः पराः सौम्येन्दुमूर्तिभैः ।
Holy hours fall before or after the Sun's entry, by its course and sign. Sixteen ghatikas are holy.