Story of Shani Dev, Ravana and Hanuman
As per the various ancient stories, Lord Rama, a progeny of the Sun and a gem of the ‘Raghukul’ was exiled due to the anguish of Shanidev. The golden city of Ravana was turned into ashes just because he had insulted Shanidev. According to an ancient story Ravana invaded over Shanidev’s territory, since he was overambitious for attaining immortality. He had imprisoned Shanidev. As per the law of Brahma, Shanidev remained in Ravana’s imprisonment till Lord Hanuman reached Lanka, in search of ‘Maa’ Sita. When fire was set on the tail of Hanuman ji and with the help of his tail, he set Lanka on fire. He found Shanidev in the basement of Ravana’s palace. At the humble request of Shanidev, Shree Hanuman ji made him free from confinement. Consequently, Shanidev starred at Lanka through his slayer aspect and it was ruined away within no time, leaving behind none; from Ravana’s family. Lanka was ruined away to ashes and Shree Hanuman received the help of Shanidev in his attempt to ruin away Lanka. Since Shanidev got pleased with Hanuman, he asked him for service. At this, Shree Hanuman got a promise from Shanidev that he may not trouble those people who are the devotees of Lord Hanuman.
A lot many stories from our ancient books justify of keeping up the words given by Shanidev to Shree Hanuman ji.
As few Epics say, Pandavas were made to dwell in the forest due to the fatal effects of Shanidev. Their troubles could come to an end, only after prospecting Lord Hanuman and the grace bestowed by him. Even King ‘Nal’ happened to undergo lot many troubles. His troubles could finally come to an end with a result of the devotion of Lord Hanuman.