Rig Veda 2.43: HERE on the right sing forth chanters of hymns of praise…

HERE on the right sing forth chanters of hymns of praise, even the winged birds that in due season speak.
He, like: a Sama-chanter utters both the notes, skilled in the mode of Trstup and of Gayatri.

Thou like the chanter-priest chantest the Sama, Bird; thou singest at libations like a Brahman's son.
Even as a vigorous horse when he comes near the mare, announce to us good fortune, Bird, on every side, proclaim in all directions happy luck, O Bird.

When singing here, O Bird. announce good luck to us, and when thou sittest still think on us with kind thoughts.