Matsya Purana 183.91

183.91

āścaryabhūtaṃ deveśa! saṃśayo hṛdi vartate.
kutaśca sambhavo deva! sarvaṃ me brūhi pṛcchataḥ .. 183.91 ..

After that, that stream of blood ran for a thousand Divine years Lord Viṣṇu said to Me ‘How such a skull was brought into existence Explain it to Me to drive away My doubts’ I replied, ‘Deva! hear about it In ancient times Brahmâ was endowed with Divine form after thousands of years asceticism and through His asceticism He got a fifth head shining like gold I cut it off in anger It follows Me wherever I go’—90-94