The Gayatri mantra for Budha (Mercury) is a Vedic invocation found in the tradition of Navagraha worship. While the standard Gayatri meter is derived from the Rigveda (3.62.10), the planetary Gayatris are later compositions codified in texts such as the *Mantra Mahodadhi* (chapter on graha mantras) and the *Jyotisha-tantra*. Budha, also known as Saumya (son of Soma), is the deity of intelligence, speech, and learning. The mantra 'Om Budhaya Vidmahe Rohinipriyaya Dhimahi Tanno Budhah Prachodayat' invokes Budha as the beloved of Rohini (the asterism) and seeks his illumination of the intellect.
The beej-akshara 'Bum' (बुं) is often associated with Budha, representing the element of earth and the energy of communication. According to the *Mantra-Yoga-Samhita*, chanting this Gayatri 108 times on a Wednesday (Budhavara) during the waxing moon, facing north, enhances analytical ability, eloquence, and success in commerce. The *Shaktisangama Tantra* mentions that regular recitation removes obstacles in education and sharpens memory. Traditionally, the mantra is chanted on a green cloth seat, using a rosary of green beryl or crystal.
Cautions: Those with a weak or afflicted Budha in their horoscope should chant with proper guidance, as excessive practice may overstimulate the nervous system. The mantra is best recited at dawn or during the hora of Mercury. No specific dietary restrictions are prescribed, but purity of mind and speech is emphasized. The purpose extends beyond material gains to include clarity in dharma and skill in debate, as noted in the *Devi Mahatmya* (though indirectly, through the association of Budha with Vishnu's incarnation).
Om, let us meditate on Budha, the beloved of Rohini. May that Budha inspire our intellect.
The seed-syllable 'Bum' (बुं) is associated with Budha, representing the earth element and communication energy. The mantra itself is a Gayatri meter, not a beej mantra.