Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
हस्तर्क्षं च खाविंदौ चंद्रभं दस्रभं कुजे ।सौम्ये मित्रभमाचार्यं तिष्यः पौष्णं भृगोः सुते ॥ २४२ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 242.
Hasta on Sunday. The Moon's star on Monday. Ashvini on Tuesday. On Wednesday, Anuradha. On Thursday, Pushya. On Friday, Revati.
Simple meaning: Siddhi yoga: Hasta on Sunday, Mrigashira on Monday, Ashvini on Tuesday, Anuradha on Wednesday, Pushya on Thursday, Revati on Friday.
रोहिणी मंदवारे च सिद्धियोगाह्वया अमी ।
Rohini on Saturday completes the Siddhi days. Nanda and Bhadra fall on certain weekdays.
जयासौम्ये गुरौ रिक्ता शनौ पूर्णेति नो शुभाः ।
Some tithi and weekday pairs are not good. Then a second set of pairs starts.
रिक्ता मंदे गुरोर्वारे पूर्णा सिद्धाह्वया अमी ।
These pairs are called Siddha. Then pairs of weekday and tithi begin: Monday on the 11th, Sunday on the 12th.