Śatapatha Brāhmaṇa ("of a hundred paths") 11.6.2.4

11.6.2.4

atha hovāca yājñavalkyaḥ yadahamagnimuddharāmyagnihotrameva tadudyacāmyādityaṃ vā astaṃ yantaṃ sarve devā anuyanti te ma etamagnimuddhṛtaṃ dṛṣṭvopāvartante'thāham pātrāṇi nirṇijyopavāpyāgnihotrīṃ dohayitvā paśyanpaśyatastarpayāmīti tvaṃ nediṣṭhaṃ yājñavalkyāgnihotrasyāmīmāṃsiṣṭhā dhenuśataṃ dadāmīti hovāca na tvevainayostvamutkrātriṃ na gatiṃ na pratiṣṭhāṃ na tṛptiṃ na punarāvṛttiṃ na lokam pratyutthāyinamityuktvā rathamāsthāya pradhāvayāṃ cakāra

Then Yâgñavalkya said, 'When I take out the fire (from the Gârhapatya), it is the Agnihotra itself, I thereby raise Now when Âditya (the sun) sets, all the gods follow him; and when they see that fire taken out by me, they turn back. Having then cleansed the (sacrificial) vessels, and deposited them (on the Vedi), and having milked the Agnihotra cow, I gladden them, when I see them, and when they see me.'--'Thou, O Yâgñavalkya, hast inquired most closely into the nature of the Agnihotra,' said the king; 'I bestow a hundred cows on thee. But not even thou (knowest) either the uprising, or the progress, or the support, or the contentment, or the return, or the renascent world of those two (libations of the Agnihotra).' Thus saying, he mounted his car and drove away.