Matsya Purana 265.53

265.53

trirātramekarātraṃ vā pañcarātramathāpi vā.
saptarātramatho kuryyāt kvacitsadyo'dhivāsanam
sarvayajñaphalo yasmādadhivāsotsavaḥ sadā .. 265.52

In course of the night festivities should be observed Dancing singing should be performed Till Chaturthî Karma Brâhmaṇas should be fed Adhivâsa should be observed for 3, 5, 7 or 1 nights On some occasions Adhivâsa may be observed at once The Adhivasa ceremony performed on such occasions gives the benefit of having performed all the sacrifices—51 52