One day, the Sun and the Moon had a quarrel as to who was the stronger of the two.
The two argued with each other for ages and finally the Sun declared that the Moon could not shine if the Sun’s light did not fall on it and illuminate it. To prove his might and utility, the Moon proudly replied, “You burn the earth with your heat and give light, but when I shine at night women come outdoors to spin in the moonlight.”
On hearing this, the Sun became so angry that he picked up some mud and flung it at the Moon’s face. The Moon tried to get out of the way but couldn’t and the mud got stuck to him.
It is believed that since then the Moon has dark spots on its face, where the Sun threw mud at it.