puruṣasya mahātmanaḥ

tat-that; ahuh-is said; aksaram-infallible; brahma-the supreme; sarva-karana-all causes; karanam-the supreme cause; visnoh dhama-the spiritual abode of Visnu; param-the supreme; saksat-without doubt; purusasya-of the purusa incarnation; mahatmanah-of the Maha-Visnu.