Māṇḍūkī Śikṣā 34

34

ṛgyajuḥsāmabhiḥ pūto brahmalokaṃ sa gacchati
svarātsvaraṃ saṅkamate svarasandhimanulbaṇam

purified by the Ṛg-, Yajur-, and Sāma-vedas, goes to the Brahmaloka. / He passes from tone to tone with a harmonious junction of tones;