MUṆḌAKA UPANISHAD · 1.1.2

अथर्वणे यां प्रवदेत ब्रह्माऽथर्वा तं
पुरोवाचाङ्गिरे ब्रह्मविद्याम् ।
स भारद्वाजाय सत्यवाहाय प्राह
भारद्वाजोऽङ्गिरसे परावराम् ॥ २॥

atharvaṇe yāṃ pravadeta brahmā’tharvā taṃ
purovācāṅgire brahmavidyām ।
sa bhāradvājāya satyavāhāya prāha
bhāradvājo’ṅgirase parāvarām ॥ 2॥

The God-knowledge by Brahma declared to Atharvan, Atharvan of old declared to Angir; he to Satyavaha the Bharadwaja told it, the Bharadwaja to Angiras, both the higher and the lower knowledge.

Sri Aurobindo · CWSA 18, p. 131