Agnihotra

[2] This tradition dates back to the Vedic age; the Brahmans perform the Agnihotra ritual chanting the verses from the Rigveda.

In the historical Vedic religion, Agnihotra was the simplest public rite, and the head of every Brahmin and Vaishya family was required to conduct it twice daily.

The tradition is now practiced in many parts of South Asia in the Indian sub-continent, including primarily India and also in Nepal.

[5][6] Vedic rituals are typically performed by four priests: the aforementioned adhvaryu, who is responsible for the physical details of the sacrifice and chants the Yajurveda, a hotṛi who recites the Rigveda, an udgātṛi who sings hymns of the Samaveda, and a brahman who supervises the ceremony, and recites the Atharvaveda while correcting any errors that may occur.

The origin of the exclamation svāhā, said as offerings are made into the sacrificial fire, is explained as a combination of svā (own) and āha (spoken).

In another, the agnihotra is a condensed version of a thousand-year sacrifice Prajapati and the other devas performed to gain divine power.

The first source of inscription evidence was from Tachapal tole, east part of Bhaktapur city, also shown by a legend that the Maithila King Harisimhadeva would establish the yantra of Taleju Bhavānī in the house of an Agnihotri.

[13] Arya Samaj is a religious reform movement founded in 1875 advocating a return to Vedic religion as interpreted by its founder, Dayananda Saraswati.

[16] In 2007, Sylvia Kratz and Ewald Schaung found that while Agnihotra ash possibly increased the amount of phosphorus in soil, levels were the same regardless of whether the ceremony was done at the prescribed times with mantras or not.