Śatapatha Brāhmaṇa ("of a hundred paths") 3.6.3.18

3.6.3.18

sa dakṣiṇasya havirdhānasya nīḍe kṛṣṇājinamāstṛṇāti | tadenamāsādayati deva savitareṣa te somastaṃ rakṣasva mā tvā dabhanniti tadenaṃ devāyaiva savitre paridadāti guptyai

He spreads the black deer-skin on the enclosed part of the southern Soma-cart, and sets him down thereon with (Vâg. S. V, 39), 'O divine Savitri, this is thy Soma: shield him; may they not injure thee!' whereby he makes him over to the God Savitri for protection.