महानारायण उपनिषद् ३४ ,३५& ३६ Mahanarayan upnisad 34 35 36

During the Upanayanam sanskaar the child is initiated to the worship of Goddess Gayatri (to make the intellect bright) and Goddess Saraswati  
आयातु वरदा देवी अक्षरं ब्रह्मसंमितम्। गायत्रीं छन्दसां मातेदं ब्रह्म जुषस्व मे।

 यदह्नात्कुरुते पापं तदह्नात्प्रतिमुच्यते। यद्रात्रियात्कुरुते पापं तद्रात्रियात्प्रतिमुच्यते। सर्व वर्णे महादेवि सन्ध्याविद्ये सरस्वति॥
ओजोऽसि सहोऽसि बलमसि भ्राजोऽसि देवानां धामनामासि विश्वमसि विश्वायु-स्सर्वमसि सर्वायु-रभिभूरों गायत्री-मावाहयामि सावित्री-मावाहयामि सरस्स्वती-मावाहयामि॥
May the boon-conferring discrimination granting Devi Gayatri come to us (in order to instruct us about) the imperishable Brahman who is determined by Vedanta. May Gayatri, the mother of metres, favour us with the Supreme just mentioned. O Devi! thou art the source of all letters, O Devi! The great Deity, O thou the object of meditation at twilight, O thou Sarasvati, may your devotee be liberated from the sin that he commits during the day by the same day and the sin which he commits during the night by the same night.

O Devi Gayatri, Thou art the essence of strength. Thou art patience, or the subduing power. Thou art physical capacity. Thou art splendour. Thou art the abode of gods and their name. Thou art the insentient universe. Thou art the full span of life or the Lord of all. Thou art every living thing. Thou art the life span of all. Thou art the vanquisher of all that is hostile to us. Thou art the Truth denoted by the Pranava. I invoke Gayatri, (into my heart). I invoke Savitri. I invoke Sarasvati.
उत्तमे शिखरे जाते भूम्यां पर्वतमूर्धनि। ब्राह्मणेभ्योऽभ्यनु ज्ञाता गच्छदेवि यथासुखम्।
 स्तुतो मया वरदा वेदमाता प्रचोदयन्ती पवने द्विजाता।
 आयुः पृथिव्यां द्रविणं ब्रह्मवर्चसं मह्यं दत्वा प्रजातुं ब्रह्मलोकम्।
O Goddess, Thou may go and remain at thy pleasure on the highest and holiest peak on the earth, or in any high place until the brahmanas remember thee again. May the boon-conferring mother of the Vedas, who has been invoked by me, who impels the created beings like wind and who has two places of birth, depart to the excellently produced world of Brahman having conferred on me, here on the earth, long life, wealth and power of Vedic learning.