paristīryātha paryukṣed
anvādhāya yathā-vidhi
prokṣaṇyāsādya dravyāṇi
prokṣyāgnau bhāvayeta mām
paristīrya - scattering (kuśa grass); atha - then; paryukṣet - he should sprinkle with water; anvādhāya - performing the ritual of anvādhāna (placing wood into the fire with recitations of oṁ bhūr bhuvaḥ svaḥ); yathā-vidhi - according to the standard prescription; prokṣaṇyā - by the water in the ācamana vessel; āsādya - having arranged; dravyāṇi - the items to be offered as oblations; prokṣya - sprinkling them; agnau - within the fire; bhāvayeta - he should meditate; mām - on Me.
Śrīla Jīva Gosvāmī mentions that one should meditate upon the Lord as the Supersoul within the sacrificial fire.