Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
धिष्णान्यर्कत्रयांतेज्यरुद्रादित्युत्तराणि च ।विष्णुत्रयाश्विमित्राब्जयोनिभान्युपनायने ॥ ३५७ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 357.
For the upanayana (sacred thread rite), the nakshatras (stars) are: Hasta, Chitra and Swati; Revati; Pushya; Ardra; Punarvasu; the three Uttaras; Shravana and the two after it; Ashvini; Anuradha; and Rohini.
Simple meaning: For the thread rite, good stars include Hasta, Revati, Pushya, Punarvasu, Shravana, Ashvini, Anuradha and Rohini.
जन्मभाद्दशमं कर्म संघातर्क्षं तु षोडशम् ।
Counting from the birth star, the 10th, 16th, 18th and 23rd stars are marked out.
मानसं पंचविंशर्क्षं नाचरेच्छुभमेषु तु ।
Avoid those stars. Jupiter, Mercury and Venus days are good. Moon and Sun days are middling.
वारौ तु मध्यमौ चैव व्रतेऽन्यौ निंदितौ मतौ ।
Moon and Sun days are middling. Mars and Saturn days are bad. Do god rites in the first third of the day.