Śatapatha Brāhmaṇa ("of a hundred paths") 2.4.4.2

2.4.4.2

sa vai dakṣo nāma | tadyadenena so 'gre 'yajata tasmāddākṣāyaṇayajño nāmotainameke vasiṣṭhayajña ityācakṣata eṣa vai vasiṣṭha etameva tadanvācakṣate sa etena yajñeneje sa etena yajñeneṣṭvā yeyam prajāpateḥ prajātiryā śrīretadbabhūvaitāṃ ha vai prajātim prajāyata etāṃ śriyaṃ gacati ya evaṃ vidvānetena yajñena yajate tasmādvā etena yajeta

Now he was indeed Daksha: and because he sacrificed in the beginning with this sacrifice, it is called Dâkshâyana-sacrifice. Some, however, call it the Vasishtha-sacrifice; for he (Pragâpati) is indeed vasishtha (the best), and after him they call it. He sacrificed with that sacrifice; and what race, what prosperity of Pragâpati was then produced through his performing that sacrifice, that same race he procreates, that same prosperity he obtains, whosoever, knowing this, performs that sacrifice: let him therefore perform that sacrifice.