Śatapatha Brāhmaṇa ("of a hundred paths") 2.4.4.3

2.4.4.3

teno ha tata īje | pratīdarśaḥ śveknaḥ sa ye tam pratyāsusteṣāṃ vivacanamivāsa vivacanamiva ha vai bhavati ya evaṃ vidvānetena yajñena yajate tasmādvā etena yajeta

Now that same sacrifice was afterwards performed by Pratîdarsa Svaikna; and he indeed was an authority to those who emulated him. An authority, therefore, he will become, whosoever, knowing this, performs that sacrifice: let him, therefore, perform that sacrifice.