Jaiminīya (Talavakāra) Brāhmaṇa 1.232

1.232

iti
eṣa ha vā ubhayatojyotiryajñakraturyadatirātraḥ
trivṛtpurastādbahiṣpavamānaṃ bhavati trivṛdupariṣṭādrāthantaraḥ saṃdhiḥ
agnirvai pūrvastrivṛdāditya uttaraḥ
agninā vā ayaṃ loko jyotiṣmānādityenāsau
ubhayatojyotiṣāsya yajñakratuneṣṭaṃ bhavati jyotiṣmānasmiṃśca loke'muṣmiṃśca
bhavati ya evaṃ veda
tau vā etau brahma caiva kṣatraṃ ca
brahma vai trivṛtkṣatraṃ pañcadaśaḥ
tadetadbrahma ca kṣatraṃ ca saṃdhāya rātriṃ vahataḥ
tadetadbrahma ca kṣatraṃ ca saṃdhāyāntataḥ pāpmānamapahataḥ
tadyadetau stomāvantataḥ kriyete pāpmāna evāpahatyai
apa pāpmānaṃ hate ya evaṃ veda
tau yadgāyatrīṃ saṃpadyete - tejo vai brahmavarcasaṃ gāyatrī - tejasyeva
tadbrahmavarcase pratitiṣṭhati
atho yajamānameva tadāyuṣi pratiṣṭhāpayati sarvāyuṣṭvāya
prāṇo hi gāyatrī
sarvamāyureti ya evaṃ veda

This indeed is the sacrificial rite having light at both ends, namely the Atirātra. / The bahiṣpavamāna in front is trivṛt; the rāthantara-saṃdhi at the end is trivṛt. / Agni is the former trivṛt; Āditya is the latter. / By Agni this world has light; by Āditya that world [has light]. / With a sacrificial rite that has light at both ends has he sacrificed, and full of light he becomes in this world and in that, who knows thus. / These two, indeed, are brahman and kṣatra. / The trivṛt is brahman; the fifteen-fold [stoma] is kṣatra. / Joining together this brahman and kṣatra, they carry through the night. / Joining together this brahman and kṣatra, they strike away evil in the end. / That these two stomas are performed in the end is precisely for striking away evil. / He strikes away evil who knows thus. / That they attain to the Gāyatrī—splendor and spiritual luster are the Gāyatrī—he thereby firmly establishes himself in splendor and spiritual luster. / Moreover, he thereby establishes the sacrificer in life for full duration of life; / for breath is the Gāyatrī. / He attains full life who knows thus.