Gopathabrahmana 2.3.20

2.3.20

athāta ekāhasyaiva mādhyaṃdinam
ṛk ca vā idam agne sāma cāstāṃ
saiva nāmarg āsīt_
amo nāma sāma
sā vā ṛksāmopāvadan mithunaṃ saṃbhavāva prajātyā iti
nety abravīt sāma
jyāyān vā ato mama mahimeti
te dve bhūtvopāvadatām_
te na prati cana samavadata
tās tisro bhūtvopāvadan
yat tisro bhūtvopāvadaṃs tat tisṛbhiḥ samabhavat_
yat tisṛbhiḥ samabhavat tasmāt tisṛbhiḥ stuvanti
tisṛbhir udgāyanti
tisṛbhir hi sāma saṃmitaṃ bhavati
tasmād ekasya bahvyo jāyā bhavanti
na haikasyā bahavaḥ saha patayaḥ_
yad vai tat sā cāmaś ca samavadatāṃ tat sāmābhavat
tat sāmnaḥ sāmatvam_
sāman bhavati
śreṣṭhatāṃ gacchati
yo vai bhavati sa sāman bhavati_
asāmanya iti ha nindante
te vai pañcānyad bhūtvā pañcānyad bhūtvākalpetām āhāvaś ca hiṃkāraś ca prastāvaś ca prathamā carg udgīthaś ca madhyamā ca pratīhāraś cottamā ca nidhanaṃ ca vaṣaṭkāraś ca te yat pañcānyad bhūtvā pañcānyad bhūtvākalpetāṃ tasmād āhuḥ pāṅkto yajñaḥ