Bṛhadāraṇyaka Upaniṣad ("Great Forest Teaching") 6.4.19

6.4.19

athābhiprātareva sthālīpākāvṛtājyaṃ ceṣṭitvā sthālīpākasyopaghātaṃ juhotyagnaye svāhānumataye svāhā devāya savitre satyaprasavāya svāheti hutvoddhṛtya prāśnāti prāśyetarasyāḥ prayacchati prakṣālya pāṇī udapātraṃ pūrayitvā tenaināṃ trirabhyukṣatyuttiṣṭhāto viśvāvaso'nyāmiccha prapūrvyāṃ saṃ jāyāṃ patyā saheti

And then toward morning, after having, according to the rule of the Sthâlîpâka (pot-boiling), performed the preparation of the Âgya (clarified butter), he sacrifices from the Sthâlîpâka bit by bit, saying: 'This is for Agni, Svâhâ! This is for Anumati, Svâhâ! This is for the divine Savitri, the true creator, Svâhâ!' Having sacrificed, he takes out the rest of the rice and eats it, and after having eaten, he gives it to his wife. Then he washes his hands, fills a water-jar, and sprinkles her thrice with it, saying: 'Rise hence, O Visvâvasu, seek another blooming girl, a wife with her husband.'

Now, toward morning, having prepared melted butter in the manner of the Sthâlîpâka, he takes of the Sthâlîpâka and makes a libation, saying: 'To Agni, hail! To Anumati, hail! To the god Savitri ('Enlivener,' the Sun), whose is true procreation (satya-prasava), hail!' Having made the libation, he takes and eats, Having eaten, he offers to the other [i.e. to her]. Having washed his hands, he fills a vessel with water and therewith sprinkles her thrice, saying:--
'Arise from hence, Vis'vavasu!
Some other choicer maiden seek!
This wife together with her lord ----'