Hanuman has a very special status among the Hindu deities. He is the son of the wind God. Even Saturn (Shani) could not harm Hanuman when he was going through his Sadhe Sati (the seven and a half year period during which Saturn passes over our natal Moon). At the onset of Hanuman’s Sadhe Sati, Shani came and sat on his back. But Hanuman grew bigger and bigger and squeezed Shani between his shoulders. Shani asked him to let him go. Hanuman agreed on one condition that Shani will not harm Hanuman’s devotees.
Hanuman Chalisa is the most sacred chant for Hanuman, written by saint Tulsidas. It is auspicious to recite this especially on Tuesdays (for Mars) and Saturdays (for Shani).
This is the opening verse of Chalisa:
बुद्धिहीन तनु जानिके, सुमिरौं पवन कुमार ।
बल बुद्धिविद्या देहु मोहिं, हरहु कलेश विकार ॥
Buddhi-Hiina Tanu Jaanike, Sumirau Pavan Kumaar |
Bala Buddhi-Vidyaa Dehu Mohi, Harahu Kalesha Vikaar ||
Meaning: Realizing that I lack Intelligence, I Meditate on You, O Pavan Kumar (Son of the wind). Please bless me with Strength, Wisdom and Knowledge, and take away my Afflictions and Blemishes.
Full Chalisa: https://www.youtube.com/watch?v=liKbzGXGokU