text: Indra On the second day of the Royal Water Festival, there is a special commemoration to Lord Indra. The reversal of the Tonle Sap river suggests why a parallel could be drawn between the Khmer people and Lord Indra. Indra is the one who releases the water from the winter demon. This is the most common theme of the Rigveda concerning Lord Indra: he as the god with thunderbolt kills the evil serpent Vritra that held back rains and thus releases rains, nourishing rivers. For example, the Rigvedic hymn 1.32 dedicated to Indra reads:
  Dal Ambok
  During the ceremony, four or five punchers are assigned to help and two or three rookers are in each group. Assemblers are assigned to collect Angre mortars and search for shredded wood. Normally, at Moha Ambok, 30 to 50 mortars are used to make this a solemn ceremony. Participants at the event are organised into groups of 8 or 30 people. The Og Ambok ceremony is performed when the Moon is straight or when the Moon is directly overhead. The young men approach the central table and dance in groups lined with lanterns. A woman collects the Lombok and pours the bus into the man's mouth. The official calls Og Ambok repeatedly asking, "Is it full?" The participants continue to chant until the end of the Moon worship. The significance of the Og Ambok ceremony is to confirm the abundance of food stored throughout the year.
  Legend of the Cheadok: The Moon Rabbit