Kautilya's Arthashastra 14.3.55

14.3.55

tato gandhamālyena pūjayitvā nikhānayet //

Having fasted for three nights and having on the day of the star of Pushya prepared twenty-one pieces of sugar-candy, one should make oblation into the fire with honey and clarified butter; and having worshipped the pieces of sugar-candy with scents and garlands of flowers, one should bury them. When, having on the next day of the star of Pushya unearthed the pieces of sugar-candy, and chanting the above mantra, one strikes the door-panel of a house with one piece and throws four pieces in the interior, the door will open itself.