Once prasadam (water or foodstuffs) is offered to the Lord, His Plate should remain on the altar for about 15-20 minutes (while the portion in the pots may be taken by the devotees). Water need only remain there for a few minutes. Once the prasadam is removed from the altar, and touched by us, it should not again be placed on the altar. Whatever we offer should be as fresh and pure as is possible.
Letter to Karunamayi Dasi, 25 February, 1968