Kaushitakagrihyasutra 2.2.7

2.2.7

bhūrbhuvaḥsvaḥ ityañjalāvañjalīṃstrīnāsicya dakṣiṇottarābhyāṃ pāṇibhyāṃ pāṇī saṃgṛhya japati devasya tvā savituḥ prasave 'śvinorbāhubhyāṃ pūṣṇo hastābhyāmupanayāmyasau iti \7\

With: 'Bhūr, bhuvaḥ, svaḥ,' having poured three cupfuls of water into his hands joined as a cup, having grasped his hands with his right hand over the left, he recites: 'At the impulse of the divine Savitṛ, with the arms of the Aśvins, with the hands of Pūṣan, I initiate you, so-and-so.'