Śatapatha Brāhmaṇa ("of a hundred paths") 6.5.2.6

6.5.2.6

athaitena caturthena yajuṣā karoti | viśve tvā devā vaiśvānarāḥ kṛṇvantvānuṣṭubhena candasāṅgirasvaditi diśo haitadyajuretadvai viśve devā vaiśvānarā eṣu lokeṣūkhāyāmetena caturthena yajuṣā diśo 'dadhustathaivaitadyajamāna eṣu lokeṣūkhāyāmetena caturthena yajuṣā diśo dadhātyaṅgirasvaditi prāṇo vā aṅgirā dhruvāsīti sthirāsītyetadatho pratiṣṭhitāsīti diśo 'sīti diśo hyetadyajurdhārayā mayi prajāṃ rāyaspoṣaṃ gaupatyaṃ suvīryaṃ sajātānyajamānāyetyetadvai viśve devā vaiśvānarā diśaḥ kṛtvā tāsvetāmāśiṣamāśāsata tathaivaitadyajamāno diśaḥ kṛtvā tāsvetāmāśiṣamāśāste

He then makes it (complete), with this fourth prayer, 'May the All-gods, the friends of all men, fashion thee, Aṅgiras-like, by the Anushtubh metre!'--this prayer, doubtless, is the (four) quarters, and the All-gods, the friends of all men, did then, by means of this prayer, put the quarters into these worlds, (that is) into the fire-pan; and in like manner does the Sacrificer, by means of this prayer, now put the quarters into these worlds, into the fire-pan;--'Aṅgiras-like,' he says, because Aṅgiras is the breath;--'Thou art steadfast!'--that is, 'thou art firm,' or 'thou art fixed;'--'Thou art the quarters!' for this prayer indeed is the quarters;--'Establish in me offspring, increase of wealth, lordship of cattle, manhood, clansmen for the Sacrificer!' For the All-gods, the friends of all men, having fashioned the quarters, invoked this blessing on them; and in like manner the Sacrificer, having fashioned the quarters, now invokes this blessing on them.