Śatapatha Brāhmaṇa ("of a hundred paths") 6.2.2.28

6.2.2.28

sa yatkanīyaḥ saṃvatsarāddīkṣitaḥ syāt | alokā iṣṭakā upadadhyādeṣṭakā lokānatiricyerannatha yadbhūyaso lokānkṛtveṣṭakā nānūpadadhyāllokā iṣṭakā atiricyerannatha yadamāvāsyāyāṃ dīkṣitvāmāvāsyāyāṃ krīṇāti tadyāvantameva lokaṃ karoti tāvatīriṣṭakā upadadhātyathāsyāpūryamāṇapakṣe sarvo 'gniścīyate

Now, were he to be initiated during less than a year, he would build up bricks without space (for them): the bricks would exceed the spaces. And if, after making more spaces, he were not to fill up bricks in accordance therewith, the spaces would exceed the bricks. And when, after initiating himself at new moon, he buys (Soma) at new moon, he piles up as many bricks as he (during the interval) makes space for; and when his (Agni's second) wing is covered (with loose soil), the whole Agni is built up.