Relation with Shani (Saturn)

                           In Hinduism, Hanuman is the only God not afflicted by Shani.Hanuman is the one of the deities in Hindu religion, over whom Shani could not cast his spell. Shani who did not spare Shiva, Vishnu and Brahma could not overcome Hanuman and as such people worship Hanuman to get rid of malefic effects of Shani.

               In the Ramayana, Hanuman is said to have rescued Shani, from the clutches of Ravana. In gratitude, Shani promised Hanuman that those who prayed him (Hanuman) would be rescued from the painful effects of Saturn, which in Hindu astrology, is said to produce malefic effects on one's life when one is afflicted "negatively" with Saturn.
                  Another version of the encounter between Lord Hanuman and Shani Bhagavan is that the latter once climbed on to Lord Hanuman's shoulder, implying that he (Hanuman) was coming under the effects of the influence of Shani. At this, Hanuman assumed a large size, and Shani was caught painfully between Hanuman's shoulders and the ceiling of the room they were in. As the pain was unbearable, Shani requested Hanuman to release him, promising that he (Shani) would moderate the malefic effects of his influence on a person praying to Hanuman. Hanuman released Shani thereafter.
                    In the verse with a thousand Names of Hanuman the Hanumansahasranam stotra, Shani is one of the Names of Hanuman. In some regions of India, Hanuman is also seen sporting an iron whip akin to Shani