Domain
Discipline, longevity, karma. Shani is the karaka of discipline, longevity and accumulated karma. Saade Sati is Shani's 7.5-year transit; the Hanuman yantra is its classical remedy.
Sacred day
Saturday. Activate the yantra at sunrise on this day for the strongest field.
Bija mantra
Om Pram Prim Praum Sah Shanaischaraya Namaha
Chant 108 times daily during the activation period (40 days minimum), and 27 times daily thereafter.
Recommended yantra
Hanuman Yantra Card — the traditional Bhagya Cards pairing for Shani (Saturn).
When to invoke
If your kundali shows Shani (Saturn) as a weak or afflicted graha, or if you are currently in its mahadasha or antardasha, the yantra is the standard upaaya. Combine with the bija mantra, a charity in the planet's name, and (for some grahas) fasting on the appropriate day.
Cross-references
See also: Yantras by zodiac sign · Navagraha — full glossary entry · All yantras.