One verse

Srimad Bhagavatam 3.22.35

3.22.35

अयातयामास्तस्यासन् यामा:स्वान्तरयापना: । श‍ृण्वतो ध्यायतो विष्णो: कुर्वतो ब्रुवत: कथा: ॥ ३५ ॥

ayata-yamas tasyasan yamah svantara-yapanah srnvato dhyayato visnoh kurvato bruvatah kathah

ayata-yamah
time never lost
tasya
of Manu
asan
were
yamah
the hours
sva-antara
his duration of life
yapanah
bringing to an end
srnvatah
hearing
dhyayatah
contemplating
visnoh
of Lord Visnu
kurvatah
acting
bruvatah
speaking
kathah
the topics.

Consequently, although his duration of life gradually came to an end, his long life, consisting of a Manvantara era, was not spent in vain, since he ever engaged in hearing, contemplating, writing down and chanting the pastimes of the Lord.