BṚHADĀRAṆYAKA UPANISHAD · 3.1.1

जनको ह वैदेहो बहुदक्षिणेन यज्ञेनेजे ।
तत्र ह कुरुपञ्चालानां ब्राह्मणा अभिसमेता बभूवुः ।
तस्य ह जनकस्य वैदेहस्य विजिज्ञासा बभूव -- कः स्विद् एषां ब्राह्मणानाम् अनूचानतम इति ।
स ह गवां सहस्रम् अवरुरोध ।
दशदश पादा एकैकस्याः शृङ्गयोर् आबद्धा बभूवुः ॥

janako ha vaideho bahudakṣiṇena yajñeneje ।
tatra ha kurupañcālānāṃ brāhmaṇā abhisametā babhūvuḥ ।
tasya ha janakasya vaidehasya vijijñāsā babhūva -- kaḥ svid eṣāṃ brāhmaṇānām anūcānatama iti ।
sa ha gavāṃ sahasram avarurodha ।
daśadaśa pādā ekaikasyāḥ śṛṅgayor ābaddhā babhūvuḥ ॥

Ganaka Vaideha (the king of the Videhas) sacrificed with a sacrifice at which many presents were offered to the priests of (the Asvamedha). Brâhmanas of the Kurus and the Pâñkâlas had come thither, and Ganaka Vaideha wished to know, which of those Brâhmanas was the best read. So he enclosed a thousand cows, and ten pâdas (of gold) were fastened to each pair of horns.

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)