Lord Nrisimha at the Hastishaila caves took one more form of Nrisimha and chased away the demons towards the West and stayed there as yoga Nrisimha to ensure that they do not return. Since the Lord resided here with Prithi(Pleasure) this Kshetra is called Vellukkai(Vel - prithi - with pleasure)

This Kshetra is at about 3 kms from Varadarajaswami temple in Kanchipuram.