hiranmayah-the Garbhodakasayi Visnu, who also assumes the virata-rupa; sah-He; purusah-incarnation of Godhead; sahasra-one thousand; parivatsaran-celestial years; anda-kosa-within the global universe; uvasa-resided; apsu-on the water; sarva-sattva-all living entities lying with Him; upabrmhitah-so spread.