Gayatri Puja (Anushthana)

"Vedanam Mata Amritasya Nabhih", " Gayatri Chhandasam Mata", " Gayatri Sarvani Savanani Vahati" and other references in the Vedas establish"Goddess Gayatri" as the Vedmata. In Bhagvadgeeta, Lord Krishna says, "Gayatri Chhandsamaham" which means, I am Gayatri in the Vedas. In all the mantras, only "Gayatri Mantra" is the one by chanting which man can break free off even great sins, as is laid down in the Smriti and Pauranic verses, " Gayatri Japkridbhavatya Sarvapapaih Pramuchyate" ( Parashara Smriti), " Sarvapapani Nashyanti Gayatri Japato Nrip" ( Bhavishya Purana) and other such references are found which tell that chanting of "Gayatri Mantra" can free one of even the greatest sins. 

Gayatri Mantra

OM BHURBHUVAH SVAH TATSAVITURVARENAYAM
BHARGO DEVASYA DHIMAHI DHIYO YONAH PRACHODAYAT