Bhṛgu–Bharadvāja-saṃvāda: Vānaprastha-parivrājaka-ācāra, Abhaya-dharma, and Lokānāṃ Vibhāga (Śānti-parva 185)
तत्रैकगुणमाकाशं शब्द इत्येव तत्स्मृतम् । तस्य शब्दस्य वक्ष्यामि विस्तरं विविधात्मकम्
tatraikaguṇam ākāśaṃ śabda ity eva tat smṛtam | tasya śabdasya vakṣyāmi vistaraṃ vividhātmakam | eṣa saptavidhaḥ prokto guṇa ākāśasambhavaḥ |
ଏଠାରେ ଆକାଶର ଏକମାତ୍ର ଗୁଣ ‘ଶବ୍ଦ’ ବୋଲି ସ୍ମୃତିରେ କୁହାଯାଇଛି। ଏବେ ମୁଁ ସେଇ ଶବ୍ଦଗୁଣର ବହୁରୂପୀ ବିସ୍ତାରକୁ ବିସ୍ତୃତ ଭାବେ କହିବି। ଆକାଶସମ୍ଭବ ଏହି ଗୁଣ ସପ୍ତବିଧ—ଷଡ୍ଜ, ଋଷଭ, ଗାନ୍ଧାର, ମଧ୍ୟମ, ପଞ୍ଚମ, ଧୈବତ ଓ ନିଷାଦ।
भरद्वाज उवाच
Space (ākāśa) is characterized by a single fundamental attribute—sound (śabda). That one attribute is then analyzed as having a structured, sevenfold manifestation, commonly understood as the seven musical notes (saptasvara).
Bharadvāja is teaching a philosophical account of the elements and their qualities. In this verse he identifies the defining quality of ākāśa as sound and announces a detailed explanation of sound’s differentiated forms, presented as seven kinds.