A sandstone slab with a group seven lingas, that was found in My Son (fig.) and dating from around the 10th to 11th century AD. These type of stone slabs with carved lingas could be moved about and placed in rivers, in order to fertilize the water that flowed over it and fed the rice paddies so as to ensure an abundant yield. Alternatively, the people of the past carved lingas into the riverbed itself, as it was (and by some still is) believed that any liquid, such as milk or water, passed over a linga becomes sacred, even magical.