Mantra 4

स य एतमेवं विद्वांश्चतुष्कलं पादं ब्रह्मणोऽनन्तवानित्युपास्तेऽनन्तवानस्मिँल्लोके भवत्यनन्तवतो ह लोकाञ्जयति य एतमेवं विद्वांश्चतुष्कलं पादं ब्रह्मणोऽनन्तवानित्युपास्ते ॥ ४.६.४ ॥

In plain words

He who, knowing this, worships the four-portioned foot of Brahman as the Endless becomes endless in this world; and he wins endless worlds, who knowing this worships the four-portioned foot of Brahman as the Endless.