Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 6 · Calendar, Muhurta Elements
कालमानं मुहूर्ताङ्गानि च
रिक्ता मंदे गुरोर्वारे पूर्णा सिद्धाह्वया अमी ।एकादश्यामिंदुवारो द्वादश्यामर्कवासरः ॥ २४५ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 245.
Rikta (empty tithi) on Saturday and Purna on Thursday. These are called Siddha. Monday on the 11th tithi (moon day). Sunday on the 12th.
Simple meaning: These pairs are called Siddha. Then pairs of weekday and tithi begin: Monday on the 11th, Sunday on the 12th.
षष्ठी गुरौ तृतीया ज्ञेऽष्टमी शुक्रे शनैश्चरे ।
These weekday and tithi pairs are called burnt days.
भरण्यर्कदिने चंद्रे चित्राभौमेतु विश्वभम् ।
Six weekday and star pairs are named: Bharani, Chitra, Uttara Ashadha, Dhanishta, Uttara Phalguni and Jyeshtha.
रेवती मंदवारे तु ग्रहजन्मर्क्षनाशनम् ।
Revati on Saturday completes the list. A group of four stars from Vishakha starts for the weekdays.