Śatapatha Brāhmaṇa ("of a hundred paths") 13.8.4.10

13.8.4.10

tasya purāṇo'naḍvāndakṣiṇā purāṇā yavāḥ purāṇyāsandī sopabarhaṇaiṣā nvādiṣṭā dakṣiṇā kāmaṃ yathāśraddham bhūyasīrdadyāditi nvagnicitaḥ

The sacrificial fee for this (ceremony) consists of an old ox, old barley, an old arm-chair with head-cushion--this at least is the prescribed Dakshinâ, but he may give more according to his inclination. Such, indeed, (is the performance) in the case of one who had built a fire-altar.