catuḥ-yuga - four ages; sahasram - one thousand; tu - indeed; brahmaṇaḥ - of Lord Brahmā; dinam - the day; ucyate - is said; saḥ - that; kalpaḥ - a kalpa; yatra - in which; manavaḥ - original progenitors of mankind; caturdaśa - fourteen; viśām-pate - O King.

One thousand cycles of four ages constitute a single day of Brahmā, known as a kalpa. In that period, O King, fourteen Manus come and go.