Mahapurâna Srimad Devî Bhâgavatam (5)
Chapter V
On the narrative of Hayagrîva
1-4. The Risis said :-- “O Sûta! Our minds are merged in the sea of doubt, hearing your this most wonderful saying, surprising to the whole world. The head of Janârdan Mâdhava, the Lord of all, was severed out of His body! And He was afterwards known as Hayagrîva, the horse-faced! Oh! what more wonder can there be than this? Whom the Vedas even praise, all the Devas rest on Whom, Who is the Cause of all causes, the Âdi Deva Jagannath (the Lord of the universe), Oh! how is it that His head came to be severed! O highly intelligent one! Describe all this to me in detail”.