SB 11.27.23

piṇḍe — within the body; vāyu — by air; agni — and by fire; saṁśuddhe — which has become completely purified; hṛt — of the heart; padma — upon the lotus; sthām — situated; parām — the transcendental form; mama — of Mine; aṇvīm — very subtle; jīva-kalām — the Personality of Godhead, from whom all living entities expand; dhyāyet — he should meditate upon; nāda-ante — at the end of the vibration of om; siddha — by perfected sages; bhāvitām — experienced.