Śatapatha Brāhmaṇa ("of a hundred paths") 3.7.2.6

3.7.2.6

atho itarathāhuḥ | dakṣiṇamevāgre 'gniṣṭhāducrayedathottaramatha dakṣiṇamuttarārdhyamuttamaṃ tatho hāsyodageva karmānusaṃtiṣṭhata iti

But they also say conversely, 'Let him first set up that which is south of the one opposite the fire, then the northern one, then a southern one,--last of all the one on the northern flank: and thus indeed his work attains completion towards the north.'