Śatapatha Brāhmaṇa ("of a hundred paths") 13.2.7.11

13.2.7.11

svayaṃ vājiṃstanvaṃ kalpayasveti svayaṃ rūpaṃ kuruṣva yādṛśamicasītyevainaṃ tadāha svayaṃ yajasveti svārājyamevāsmindadhāti svayaṃ juṣasveti svayaṃ lokaṃ rocayasva yāvantamicasītyevainaṃ tadāha mahimā te'nyena na saṃnaśa ityaśvameva mahimnā samardhayati

[Vâg. S. XXIII, 15,1 'Thyself, fit out thy body, O racer,'--'Take thyself the form which thou wishest,' he thereby says to him;--'make offering thyself,'--sovereign rule (independence) he thereby confers on it;--'rejoice thou thyself,'--'enjoy (rule) thou thyself the world as far as thou wishest,' he thereby says to him;--'thy glory is not to be equalled by any one!'--with glory he thereby endows the horse.