Gopathabrahmana 1.1.8

1.1.8

tam aṅgirasam ṛṣim abhyaśrāmyad abhyatapat samatapat
tasmāc chrāntāt taptāt saṃtaptād viṃśino 'ṅgirasa ṛṣīn niramimīta
tān viṃśino 'ṅgirasa ṛṣīn abhyaśrāmyad abhyatapat samatapat
tebhyaḥ śrāntebhyas taptebhyaḥ saṃtaptebhyo daśatayān āṅgirasān ārṣeyān niramimīta ṣoḍaśino 'ṣṭādaśino dvādaśina ekarcān dvyṛcāṃs tṛcāṃś caturṛcān pañcarcān ṣaḍarcān saptarcān iti
tān aṅgirasa ṛṣīn āṅgirasāṃś cārṣeyān abhyaśrāmyad abhyatapat samatapat
tebhyaḥ śrāntebhyas taptebhyaḥ saṃtaptebhyo yān mantrān apaśyat sa āṅgiraso vedo 'bhavat
tām āṅgirasaṃ vedam abhyaśrāmyad abhyatapat samatapat
tasmāc chrāntāt taptāt saṃtaptāj janad iti dvaitam akṣaraṃ vyabhavat
sa ya icchet sarvair etair aṅgirobhiś cāṅgirasaiś ca kurvīyety etayaiva tan mahāvyāhṛtyā kurvīta
sarvair ha vā asyaitair aṅgirobhiś cāṅgirasaiś ca kṛtaṃ bhavati ya evaṃ veda yaś caivaṃvidvān evam etayā mahāvyāhṛtyā kurute || 8 ||