Dadhichi or Dadhicha was a Vedic king, Son of Atharvan, who turned into a great Rishi. Dadhicha gave his bones to destroy Vritra. Vritra (a brahmin in this version) became the head of the Asuras (portrayed as inherently demonic here, as opposed to the Vedic version in which they can be gods or demons). He renounced his dharma – duty – to do good unto others and turned to violence, battling with the devas. Eventually, he gained the upper hand and the Devas were frightened of his evil might. Led by Indra, they approached Lord Vishnu for help. He told them that Vritra could not be destroyed by ordinary means, revealing that only a weapon made from the bones of a sage could slay him. When the deities revealed their doubts about the likelihood of any ascetic donating his body, Vishnu directed them to approach the sage (Rishi) Dadhichi. When approached by the gods, Dadhichi gladly gave up his bones for the cause of the good, stating that it would be better for his bones to help them attain victory than to rot in the ground. The Devas collected the bones and Indra crafted the Vajra from them. When they engaged Vritra again, the battle lasted for 360 days before the brahmin breathed his last.
His son Pippalada is well known for his pippalada school of thought and Praśna upnishad answers.
The mantra or incantation for Devi Hinglaj is attributed to Saint Dadhichi, an important saint in Hindu mythology. The mantra is :
OM HINGULE PARAM HINGULE AMRUTRUPINI TANU SHAKTI MANAH SHIVE SHREE HINGULAI NAMAH SWAHA
Translation : "Oh Hingula Devi, she who holds nectar in her self and is power incarnate.
She who is one with Lord Shiva, to her we pay our respects and make this offering (swaha)"
The hinglaj temple is currently located in balouchistan province of pakistan. His aashram is said to be in misrikh town, namishyaranya near Lucknow , U.P.