Shatapatha Brahmana 6.6.1.21

6.6.1.21

atha sāvitrīṃ juhoti | savitā vā etadagre karmākarottamevaitadetasmai karmaṇe prayuṅkte viśvo devasya neturmarto vurīta sakhyam viśvo rāya iṣudhyati dyumnaṃ vṛṇīta puṣyase svāheti yo devasya savituḥ sakhyaṃ vṛṇīte sa dyumnaṃ ca puṣṭiṃ ca vṛṇīta eṣa asya sakhyaṃ vṛṇīte ya etatkarma karoti

He then offers the one to Savitri, for Savitri, indeed, of old performed this rite, and he now makes use of him for this rite,--(Vâg. S. XI, 67; Rik S. V, 50, 1), 'Every mortal would choose the friendship of the divine Guide; every one craves riches, and would have glory for him to prosper, hail!' He who chooses the friendship of the god Savitri, chooses both glory and prosperity; and he who performs this rite, indeed chooses his friendship.