Matsyapurana 69.42

69.42

jalakumbhānmahāvīrya sthāpayitvā trayodaśa
bhakṣyairnānāvidhairyuktān sitavastrairalaṃkṛtān //

There should be made a sacrificial pond, one hand deep, of the shape of a conical triangle and surrounded by three circles, and after that the Brâhmaṇas should be asked to make an offering of milk, clarified butter and sesamum to Lord Viṣṇu, after the rituals of Ekâgni, with mantras sacred to Viṣṇu, after which a stream of clarified butter, of half the size of a winnowing basket (Nispâva), should be poured into the fire as well as the charu, mixed with cow's milk. Thirteen pitchers, full of water, should be placed. The mouths of these pitchers should be covered with plates of fig leaves containing different kinds of eatables and five jewels and covered with white cloths. Four Ṛigvedi Brâhmaṇas should offer sacrifices to Fire, facing north.—40-43.