The gigantic virāṭ-puruṣa, known as Hiraṇmaya, lived for one thousand celestial years on the water of the universe, and all the living entities lay with Him.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
हिरण्मयः स पुरुषः सहस्रपरिवत्सरान् । आण्डकोश उवासाप्सु सर्वसत्त्वोपबृंहितः
hiraṇmayaḥ sa puruṣaḥ sahasraparivatsarān | āṇḍakośa uvāsāpsu sarvasattvopabṛṃhitaḥ
SB 3.6.6