Shiva Purana
सूत्रं सूत्रेण संमंत्र्य शिखाग्रे बंधयेच्छिशोः ॥ चरणांगुष्ठपर्यंतमूर्ध्वकायस्य तिष्ठतः ॥ २३ ॥
After connecting the thread with a thread, one should tie it to the tip of the child’s head. Standing up to the toes of the feet.
english translation
sUtraM sUtreNa saMmaMtrya zikhAgre baMdhayecchizoH ॥ caraNAMguSThaparyaMtamUrdhvakAyasya tiSThataH ॥ 23 ॥
hk transliteration by Sanscript