Gayatri Mantra
Oṃ Bhūr Bhuvaḥ Suvaḥ Bhargo Devasyadhīmahi Dhiyo Yo Naḥ Prachodayāt || Tatsaviturvareṇyaṃ Gayatri Mantra is the Sanatana Mantra done to a formless God present in Vedas. This mantra protects the one who chants this