The offering of havi or ghṛta (ghrita, ghee) or any other element dedicated to a specific Deity, along with the utterence of mantra, is called Āhuti (Ahuti). At first, ghee contained in a pot should be heated with Gārhapatya Agni (one kind of fire). Then the Adhvaryu (the Yajurvedic priest) has to fill up the juhū (juhu, a special kind of container used for the ghee kept in ritualistic purpose) with a small equipment called ‘sruva’ (a small container with a long handle) and go to the Āhavanīya (Ahavaniya) Agni, towards the north. He will spread dūrvā (durva) grass around the Āhavanīya, and sit on his knees in front of it. And he will utter mantra along with ‘Svāhā’ (Svaha; the appended element of a mantra during ahuti), while taking that ghee from the juhū and offering it to the fire. This is called Āhuti. When one full container of ājyaghṛta ( ajyaghrita;melted ghee used for ahuti) is emptied and offered to the fire, from the srukpātra (srukpatra, a pot with a handle), it is called Purṇāhuti (Purnahuti; the full offering made to the holy fire).