CHĀNDOGYA UPANISHAD · 3.4.1

अथ ये ऽस्योदञ्चो रश्मयस् ता एवास्योदीच्यो मधुनाड्यः ।
अथर्वाङ्गिरस एव मधुकृतः ।
इतिहासपुराणं पुष्पम् ।
ता अमृता आपः ॥

atha ye ’syodañco raśmayas tā evāsyodīcyo madhunāḍyaḥ ।
atharvāṅgirasa eva madhukṛtaḥ ।
itihāsapurāṇaṃ puṣpam ।
tā amṛtā āpaḥ ॥

The northern rays of the sun are the honey-cells on the left. The (hymns of the) Atharvâṅgiras are the bees, the Itihâsa-purâna (the reading of the old stories) is the flower, the water is the nectar.

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)