Aitareyabrahmana 4.14

4.14

yad vai caturviṃśaṃ, tan mahāvratam.
bṛhaddivenātra hotā retaḥ siñcati, tad ado mahāvratīyenāhnā prajanayati.
saṃvatsare-saṃvatsare vai retaḥ siktaṃ jāyate.
tasmāt samānam bṛhaddivo niṣkevalyam bhavaty.
eṣa ha vā enam parastāt karmabhir āptvāvastād upaiti,
ya evaṃ vidvān etad ahar upaiti
svasti saṃvatsarasya pāram aśnute ya evaṃ veda
yo vai saṃvatsarasyāvāraṃ ca pāraṃ ca veda,
sa vai svasti saṃvatsarasya pāram aśnute.
'tirātro vā asya prāyaṇīyo 'vāram, udayanīyaḥ pāraṃ
svasti saṃvatsarasya pāram aśnute ya evaṃ veda
yo vai saṃvatsarasyāvarodhanaṃ codrodhanaṃ ca veda,
sa vai svasti samvatsarasya pāram aśnute.
'tirātro vā asya prāyaṇīyo 'varodhanam, udayanīya udrodhanaṃ
svasti saṃvatsarasya pāram aśnute ya evaṃ veda
yo vai saṃvatsarasya prāṇodānau veda,
sa vai svasti saṃvatsarasya pāram aśnute.
'tirātro vā asya prāyaṇīyaḥ prāṇa, udāna udayanīyaḥ
svasti saṃvatsarasya pāram aśnute ya evaṃ veda ya evaṃ veda

iv. 14 (xvii. 8). The Mahāvrata is the Caturviñça; by means of the Bṛhaddiva (hymn) the Hotṛ pours seed on this day; it on that day with the Mahāvrata day he propagates; in a year seed poured is born. Therefore the Bṛhaddiva is the common Niṣkevalya (Çastra). He having obtained it with the rites straight forward approaches it (with the rites) reversed, who knowing thus approaches this day. In safety he attains the other side of the year who knows thus. He, who knows this side and the other side of the year, in safety attains the other side of the year. The introductory Atirātra is this side, the concluding (Atirātra) is the other side. In safety he attains the other side of the year who knows thus.

He, who knows the descent and ascent of the year, obtains in safety the other side of the year. The introductory Atirātra is the descent, the concluding (Atirātra) the ascent. In safety he attains the other side of the year who knows thus. He, who knows the expiration and the ending breath of the year, attains in safety the other side of the year. The introductory Atirātra is the expiration, the concluding (Atirātra) the ending breath. In safety he reaches the other side of the year, who knows thus.