CHĀNDOGYA UPANISHAD · 5.22.1

अथ यां चतुर्थीं जुहुयात् तां जुहुयात् समानाय स्वाहेति ।
समानस् तृप्यति ॥

atha yāṃ caturthīṃ juhuyāt tāṃ juhuyāt samānāya svāheti ।
samānas tṛpyati ॥

'And he who offers the fourth oblation, should offer it to Samâna (on-breathing), saying Svâhâ. Then Samâna is satisfied,

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