CHĀNDOGYA UPANISHAD · 4.17.5

अथ यदि यजुष्टो रिष्येद् भुवः स्वाहेति दक्षिणाग्नौ जुहुयात् ।
यजुषाम् एव तद्रसेन यजुषां वीर्येण यजुषां यज्ञस्य विरिष्टं संदधाति ॥

atha yadi yajuṣṭo riṣyed bhuvaḥ svāheti dakṣiṇāgnau juhuyāt ।
yajuṣām eva tadrasena yajuṣāṃ vīryeṇa yajuṣāṃ yajñasya viriṣṭaṃ saṃdadhāti ॥

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

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