Atharvaveda 6.22.1

6.22.1

kr̥ṣṇáṃ niyā́naṃ hárayaḥ suparṇā́ apó vásānā dívam út patanti |
tá ā́vavr̥trant sádanād r̥tásyā́d íd ghr̥téna pr̥thivī́ṃ vy ūduḥ ||1||

Black the down-track, the yellow eagles, clothing themselves in waters, fly up to the sky; they have come hither from the seat of righteousness (ṛtá); then, forsooth, with ghee they deluged the earth.