Śatapatha Brāhmaṇa ("of a hundred paths") 7.4.1.26

7.4.1.26

ta etāni sarpanāmānyapaśyan | tairupātiṣṭhanta tairasmā imāṃlokānasthāpayaṃstairanamayanyadanamayaṃstasmātsarpanāmāni tathaivaitadyajamāno yatsarpanāmairupatiṣṭhata imānevāsmā etallokāntsthāpayatīmāṃlokānnamayati tatho hāsyaita etenātmanā na sarpanti

They saw those Sarpanâma and worshipped with them; by these (verses) they stopped these worlds for him, and caused them to bend themselves; and because they caused them to bend (nam) themselves, therefore (the formulas are called) Sarpanâma. And in like manner does the Sacrificer, when he stands by worshipping with the Sarpanâma formulas, stop these worlds for him, and cause these worlds to bend themselves; and so they do not glide away with that self of his.