Curse to Moon

Twenty-seven of Daksha’s daughters were married to the moon-god Chandra. One of these wives was named Rohini and Chandra loved Rohini more than he loved the other wives. The other wives felt neglected and they complained to their father. Daksha repeatedly warned his son-in-law to devote himself equally to all twenty-seven wives. But Chandra was in no mood to listen. Daksha thereupon cursed Chandra that he would gradually fade away. Brahma told him that the only recourse was to pray to Shiva. Chandra went to Prabhasa tirtha and made a lingam on the banks of the river Sarasvati. He prayed to Shiva for six months. At the end of the tapasya Shiva appeared before Chandra and offered to grant him a boon. Lord Shiva said ,  "Daksha’s curse cannot be entirely ignored. During krishnapaksha you will wane. And during shuklapaksha (the bright part of the lunar fortnight) you will wax. That should satisfy everybody. "   Chandra was delighted. The lingam to which Chandra prayed is Somantha, the first of the Jyotirlingas.