ॐ शं शनैश्चराय नमः
Om Sham Shanaishcharaaya Namah
Meaning
Salutations to Shani, the slow-moving one, with the bija Sham.
Benefit
Shani Beej Mantra — mitigates Sade Sati and Dhaiya effects. Recited on Saturdays facing the Shani idol, lamp lit with mustard oil.