Aitareyabrahmana 3.44

3.44

yo vā eṣa tapaty eṣo 'gniṣṭoma, eṣa sāhnas.
taṃ sahaivāhnā saṃsthāpayeyuḥ, sāhno vai nāma
tena saṃtvaramānās careyur, yathaiva prātaḥsavana evam,
mādhyaṃdina evaṃ tṛtīyasavana.
evam u ha yajamāno 'pramāyuko bhavati
yad dha vā idam pūrvayoḥ savanayor asaṃtvaramāṇāś caranti,
tasmād dhedam prācyo grāmatā bahulāviṣṭā.
atha yad dhedaṃ tṛtīyasavane saṃtvaramāṇaś caranti,
tasmād dhedam pratyañci dīrghāraṇyāni bhavanti.
tathā ha yajamānaḥ pramāyuko bhavati
tenāsaṃtvaramāṇāś careyur,
yathaiva prātaḥsavana evam mādhyaṃdina evaṃ tṛtīyasavana.
evam u ha yajamāno 'pramāyuko bhavati
sa etam eva śastreṇānuparyāvarteta.
yadā vā eṣa prātar udety, atha mandraṃ tapati:
tasmān mandrayā vācā prātaḥsavane śāṃsed.
atha yadābhyety, atha balīyas tapati:
tasmād balīyasyā vācā madhyaṃdine śaṃsed.
atha yadābhitarām ety, atha baliṣṭhatamaṃ tapati:
tasmād baliṣṭhatamayā vācā tṛtīyasavane śaṃsed.
evaṃ śaṃsed yadi vāca īśīta, vāg ghi śastraṃ.
yayā tu vācottarottariṇyotsaheta samāpanāya,
tayā pratipadyetaitat suśastatamam iva bhavati
sa vā eṣa na kadā canāstam eti nodeti
taṃ yad astam etīti manyante,
'hna eva tad antam itvāthātmānaṃ viparyasyate,
rātrīm evāvastāt kurute 'haḥ parastād
atha yad enam prātar udetīti manyante,
rātrer eva tad antam itvāthātmānaṃ viparyasyate,
'har evāvastāt kurute rātrīm parastāt
sa vā eṣa na kadā cana nimrocati
na ha vai kadā cana nimrocaty,
etasya ha sāyujyaṃ sarūpatām salokatām aśnute ya evaṃ veda ya evaṃ veda

iii. 44. (xiv. 6). The Agniṣṭoma is he who gives heat here; it is one to be finished in the day; with the day should they complete it; its name is what is finished with the day. They should proceed with it without haste; as at the morning pressing, so at the midday, so at the third pressing. So the sacrificer is not likely to perish. In that they proceed without hastening at the two former pressings, therefore here the villages of the east are densely populated; in that they proceed hastening at the third pressing, therefore here to the west there are long forests. Thus the sacrificer is likely to perish. Therefore without hastening they should proceed; as at the morning pressing, so at the midday, so at the third pressing. So the sacrificer is not likely to perish. He should follow in recitation the movement of this (sun); when he rises in the morning, then he gives a gentle heat; therefore he should recite in a gentle tone at the morning pressing. Then when he comes forward, he gives stronger heat; therefore at the midday should he recite with a stronger tone. Then when he comes still further forward, he gives his strongest heat; therefore he should recite at the third pressing with the strongest tone. So should he recite if he be lord of speech, for the Çastra is speech. He should begin in the tone in which he can complete, increasing in height; that is the best way of reciting. The (sun) never really sets or rises. In that they think of him 'He is setting', verily having reached the end of the day, he inverts himself; thus he makes evening below, day above. Again in that they think of him 'He is rising in the morning', verily having reached the end of night he inverts himself; thus he makes day below, night above. He never sets; indeed he never sets, union with him and identity of form and world he attains who knows thus.