Shatapatha Brahmana 11.6.3.1

11.6.3.1

janako ha vaideho bahudakṣiṇena yajñeneje sa ha gavāṃ sahasramavarundhannuvācaitā vo brāhmaṇā yo brahmiṣṭhaḥ sa udajatāmiti

Ganaka of Videha performed a sacrifice accompanied with numerous gifts to the priests. Setting apart a thousand cows, he said, 'He who is the most learned in sacred writ amongst you, O Brâhmanas, shall drive away these (cows)!'