One verse

Srimad Bhagavatam 3.11.6

3.11.6

त्रसरेणुत्रिकं भुङ्क्ते य: काल: स त्रुटि: स्मृत: । शतभागस्तु वेध: स्यात्तैस्त्रिभिस्तु लव: स्मृत: ॥ ६ ॥

trasarenu-trikam bhunkte yah kalah sa trutih smrtah sata-bhagas tu vedhah syat tais tribhis tu lavah smrtah

trasarenu-trikam
combination of three hexatoms
bhunkte
as they take time to integrate
yah
that which
kalah
duration of time
sah
that
trutih
by the name truti
smrtah
is called
sata-bhagah
one hundred trutis
tu
but
vedhah
called a vedha
syat
it so happens
taih
by them
tribhih
three times
tu
but
lavah
lava
smrtah
so called.

The time duration needed for the integration of three trasarenus is called a truti, and one hundred trutis make one vedha. Three vedhas make one lava.