Shatapatha Brahmana 14.3.1.9

14.3.1.9

athopaniṣkrāmati kṣatrasya tvā paraspāyetyetadvai daivaṃ kṣatraṃ ya eṣa tapatyasya tvā mānuṣasya kṣatrasya paraspatvāyetyevaitadāha brahmaṇastanvam pāhīti brahmaṇa ātmānaṃ gopāyetyevaitadāha viśastvā dharmaṇā vayamiti yajño vai viḍyajñasya tvāriṣṭyā ityevaitadāmānukrāmāma suvitāya navyasa iti yajñasya tvāriṣṭyā ahvalāyā ityevaitadāha

He (the Adhvaryu) then steps out, with (Vâg. S. XXXVIII, 19), 'Thee (we will follow) for the protection of the Kshatra,'--for he who shines yonder is indeed the divine ruler: 'for the protection of this human ruler,' he thereby means to say;--'guard thou the Brahman's body!'--that is to say, 'preserve thou the Brahman's person (âtman);'--'Thee (we will follow) as a stay for the Vis,'--the Vis (people, clan) doubtless is the sacrifice: 'for the safety of the sacrifice,' he thus means to say;--'we will follow to new prosperity,'--it is for the safety and the stability of the sacrifice that the says this.