Śatapatha Brāhmaṇa ("of a hundred paths") 4.1.3.12

4.1.3.12

sa hovāca | vāyavā māsmingrahe bhajeti kiṃ tataḥ syāditi niruktameva vāgvadediti niruktaṃ cedvāgvadedā tvā bhajāmīti tata eṣa aindravāyavo graho 'bhavadvāyavyo haiva tataḥ purā

He said, 'Vâyu, let me share in this cup!'--'What will then be?'--'Speech shall speak intelligibly!'--'If speech will speak intelligibly, then will I let thee share!' Thus that cup henceforward belonged to Indra and Vâyu, but theretofore it belonged to Vâyu alone.