In the vast tapestry of Hindu mythology, the celestial romance of Surya Dev (the Sun God) and his consort Sanjana stands out as one of the most enigmatic tales. Found deep within the pages of the ancient Markandeya Purana, this story moves past ordinary cosmic affairs into a dramatic chase across the realms, culminating in a magnificent transformation where both deities turn into horses.
According to the Markandeya Purana, Sanjana was the daughter of the celestial craftsman Vishwakarma (also referred to as Tvashta Prajapati). She was married to Surya, the supreme source of light and energy in the universe. While their union was blessed, Surya’s intense, burning cosmic glare proved to be an unbearable torture for Sanjana. Every time Surya approached her, she found his light so blinding that she instinctively closed her eyes. Enraged by what he perceived as a slight, Surya cursed her, proclaiming that her unsteady gaze would give birth to Yama (the God of Death and Justice) and the undulating river Yamuna. Unable to endure his fierce Tejas (splendor) any longer, Sanjana hatched a desperate plan:
Seeking refuge, Sanjana initially returned to her father Vishwakarma's house. However, a righteous father could not allow a married woman to abandon her husband permanently. Vishwakarma urged her to return to her marital home.
Fearing Surya’s unbearable heat and unwilling to go back, Sanjana fled to the cold, isolated northern wilderness known as Uttarakuru. To hide her divine identity from cosmic eyes and safely perform intense ascetic penance (Tapasya), she transformed herself into a mare (Badawa). In this equine form, she began a rigorous meditation with a singular goal: to pray that her husband’s appearance would become gentle and auspicious.
Back in the solar realm, Chhaya successfully deceived Surya for years, giving birth to her own children (including Shani Dev, or Saturn). However, a rift arose when Chhaya unfairly cursed Sanjana's son, Yama. Knowing a true mother could never curse her own flesh and blood, Surya confronted Chhaya. Under the threat of divine wrath, Chhaya confessed the entire truth.
Using his supreme divine vision, Surya located Sanjana in the forests of Uttarakuru. He observed her living peacefully, grazing and praying in the form of a beautiful mare.
Surya knew that approaching her in his burning, multi-limbed cosmic form would terrify her and defeat the purpose of her long penance. Before descending to Earth, Surya visited his father-in-law, Vishwakarma. The divine craftsman carefully trimmed away fifteen out of sixteen parts of Surya’s overwhelming radiance, forging powerful weapons for the gods (like Vishnu’s Discus and Shiva’s Trident) from the leftover solar matter. Retaining only his sixteenth part, Surya descended to Uttarakuru. To approach his wife naturally on her own terms, Surya transformed himself into a magnificent stallion.
When Sanjana saw a powerful stallion approaching, she feared it was a strange male crossing her boundaries. To protect her virtue, she turned around to face him directly. As described vividly in the Markandeya Purana:
From this extraordinary equine breath exhaled from her nostrils, the Ashvini Kumars (Nasatya and Dasra) were born. Because they were conceived through a mare's nostrils, these twin deities retained distinct horse-like characteristics and became the legendary horse-headed physicians of the gods. Immediately following them, Revanta—the divine master of horses, fully equipped with armor, swords, and a quiver—emerged from the union.
Following the birth of their equine offspring, Surya cast away his stallion form and revealed his newly softened, beautifully radiant original self to Sanjana. Overjoyed to see her husband’s blinding glare replaced by a soothing, golden light, Sanjana happily discarded her mare form.
The divine couple reunited in harmony, returning to the celestial realms together, leaving behind an eternal mythological legacy of love, sacrifice, and cosmic transformation.
Markandeya Purana - Hindi text



