Shiva Purana
प्राच्यां दिश्यप उद्धृत्य प्रक्षिपेदजलिं ततः ॥ शिखां यज्ञोपवीतं च यत्रोत्पाट्य च पाणिना ॥ ७२॥
He shall take water in the cupped palms and pour it to the east. He shall uproot the tuft and take out the sacred thread.
english translation
prAcyAM dizyapa uddhRtya prakSipedajaliM tataH ॥ zikhAM yajJopavItaM ca yatrotpATya ca pANinA ॥ 72॥
hk transliteration by Sanscript