Srimad Bhagavatam Canto 02, Chapter 10, Text 11

SB 2.10.11

tasv avatsit sva-srstasu
sahasram parivatsaran
tena narayano nama
yad apah purusodbhavah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
That Supreme Person is not impersonal and therefore is distinctively a nara, or person. Therefore the transcendental water created from the Supreme Nara is known as nara. And because He lies down on that water, He is known as Narayana.
Srimad Bhagavatam Canto 02, Chapter 10, Text 10
Srimad Bhagavatam Canto 02, Chapter 10, Text 12