Domain
Intellect, speech, commerce. Budh rules intellect, speech (vaak) and commerce. A weak Budh manifests as confused communication and poor analytical clarity.
Sacred day
Wednesday. Activate the yantra at sunrise on this day for the strongest field.
Bija mantra
Om Bram Brim Braum Sah Budhaya Namaha
Chant 108 times daily during the activation period (40 days minimum), and 27 times daily thereafter.
Recommended yantra
Budh Yantra Card — the traditional Bhagya Cards pairing for Budh (Mercury).
When to invoke
If your kundali shows Budh (Mercury) 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.