CHĀNDOGYA UPANISHAD · 4.17.6

अथ यदि सामतो रिष्येत् स्वः स्वाहेत्य् आहवनीये जुहुयात् ।
साम्नाम् एव तद्रसेन साम्नां वीर्येण साम्नां यज्ञस्य विरिष्टं संदधाति ॥

atha yadi sāmato riṣyet svaḥ svāhety āhavanīye juhuyāt ।
sāmnām eva tadrasena sāmnāṃ vīryeṇa sāmnāṃ yajñasya viriṣṭaṃ saṃdadhāti ॥

If the sacrifice is injured by the Sâma-veda side, let him offer a libation in the Âhavanîya fire, saying, Svah, Svâhâ! Thus does he bind together and heal, by means of the essence and the power of the Sâman verses themselves, whatever break the Sâman sacrifice may have suffered.

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