Gayatri Mantra

ॐ भूर्भुवः स्वः तत्सवितुर्वरेण्यं भर्गो देवस्य धीमहि धियो यो नः प्रचोदयात् ॥

Om Bhuur-Bhuvah Svah Tat-Savitur-Varennyam Bhargo Devasya Dhiimahi Dhiyo Yo Nah Pracodayaat ||

Source:

http://greenmesg.org/mantras_slokas/devi_gayatri-gayatri_mantra.php