Shiva Purana
पूर्णामापूर्य तां भूयस्तत्त्वानां शुद्धिमुद्दिशन् ॥ जुहुयान्मूलमन्त्रेण तैरेव समिदादिभिः ॥ ११ ॥
Then, filling the fullness of the water, the Lord again instructed the Supreme Personality of Godhead to purify the elements. One should offer oblations with the same sacrificial fire and other objects with the root mantra.
english translation
pUrNAmApUrya tAM bhUyastattvAnAM zuddhimuddizan ॥ juhuyAnmUlamantreNa taireva samidAdibhiH ॥ 11 ॥
hk transliteration by Sanscript