A long time ago, King Aswapati ruled over the Madra Kingdom. He was a virtuous and high-souled King, but was sorrow stricken for he was childless. For eighteen years he underwent austerities and performed a daily sacrifice in honor of the goddess Savitri...

From the book Savitri – The Golden Bridge, the Wonderful Fire (books.google.com/books?id=8sDtCQA…nepage&q&f=false)