Rig Veda 2.43

pradakṣiṇid abhi gṛṇanti kāravo vayo vadanta ṛtuthā śakuntayaḥ ubhe vācau vadati sāmagā iva gāyatraṃ ca traiṣṭubhaṃ cānu rājati

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 Trishtup and of Gayatri.

udgāteva śakune sāma gāyasi brahmaputra iva savaneṣu śaṃsasi vṛṣeva vājī śiśumatīr apītyā sarvato naḥ śakune bhadram ā vada viśvato naḥ śakune puṇyam ā vada

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.

This verse is not included in this edition.

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