One verse

Srimad Bhagavatam 3.11.8

3.11.8

लघूनि वै समाम्नाता दश पञ्च च नाडिका । ते द्वे मुहूर्त: प्रहर: षड्याम: सप्त नृणाम् ॥ ८ ॥

laghuni vai samamnata dasa panca ca nadika te dve muhurtah praharah sad yamah sapta va nrnam

laghuni
such laghus (each of two minutes)
vai
exactly
samamnata
is called
dasa panca
fifteen
ca
also
nadika
a nadika
te
of them
dve
two
muhurtah
a moment
praharah
three hours
sat
six
yamah
one fourth of a day or night
sapta
seven
va
or
nrnam
of human calculation.

Fifteen laghus make one nadika, which is also called a danda. Two dandas make one muhurta, and six or seven dandas make one fourth of a day or night, according to human calculation.