Aupasana is a yajna performed on a daily basis by Hindus who have been initiated during marriage for this. Hindu Marriage is conducted with offerings made in the fire. Aupasana, which must be performed every day, is commenced in this fire and it must be preserved throughout one's life. The seven pakayajnas (see: Shrauta), rites like upanayana and shraaddha must be conducted in the aupasana fire. The son lights his aupasana fire during his marriage from his father's aupasana fire. The son's aupasana fire, like his father's must be maintained throughout his life. Thus, without any break, the sacred fire is kept burning in the family generation after generation.