Narada Purana (Jyotisha Selections) · by Vyasa
Chapter 7 · Samskara Muhurtas
संस्कारमुहूर्ताः
दशमे शुद्धिसंयुक्ते शुभलग्ने शुभांशके ।पूर्वार्द्धे सौम्यखेटेन संयुक्ते वीक्षितेपि वा ॥ ३३३ ॥
In the full Narada Purana (Purva Bhaga) this is chapter 56, verse 333.
The 10th house should be clean. The lagna (rising sign) and navamsha (one-ninth part of a sign) should be good. Do it in the first half. A good planet should join the lagna or look at it.
Simple meaning: A good rising sign, a clean 10th house and a good planet joined or looking at it help this rite.
त्रिषष्ठलाभगैः क्रूरैः केंद्रधीधर्मगैः शुभैः ।
Bad planets in the 3rd, 6th and 11th and good planets in strong houses make the first feeding good.
तृतीये पञ्चमे चाब्दे स्वकुलाचारतोऽपि वा ।
A child's first haircut is done in the 3rd or 5th year, or as the family custom says.
सौम्यायने नास्तगयोः सुरारिसुरमन्त्रिणोः ।
Do it in the Sun's northward course, on a Monday, Wednesday, Thursday or Friday.