Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
भेष्वर्केंदुज्ञेज्यशुक्रवारलग्नांशकेषु च ।प्रतिपत्पर्वरिक्ता मा चाष्टमी च दिनत्रयम् ॥ ३९३ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 393.
Do it in these stars. Use the weekdays of the Sun, Moon, Mercury, Jupiter and Venus. Use their lagnas (rising signs) and navamshas (one-ninth parts of a sign) too. Leave out the 1st tithi (moon day) and the parva (junction day). Leave out the rikta (empty tithi), the new moon, the 8th, and the three days.
Simple meaning: Use those stars and the Sun, Moon, Mercury, Jupiter or Venus days. Avoid the 1st, 8th, empty days and new moon.
धृम्रगर्द्दभयोर्नैव व्रणं श्रेयोंत्यभागगम् ।
Dhuma and the ass mean no flaw in the blade. Next come the rules for the return-home rite.
द्विजातीनां गुरोर्गेहान्निवृत्तानां यतात्मनाम् ।
For men back from the teacher's house, good stars are Chitra, the Uttaras, Punarvasu, Pushya, Revati, Shravana, Anuradha and Rohini.
हित्वान्यदिवसे कार्यं समावर्तनमुंडनम् ।
Do the return-home rite and head-shaving on another day. The householder stage is the best of all.