One verse

Srimad Bhagavatam 1.4.19

1.4.19

चातुर्होत्रं कर्म शुद्धं प्रजानां वीक्ष्य वैदिकम् । व्यदधाद्यज्ञसन्तत्यै वेदमेकं चतुर्विधम् ॥ १९ ॥

catur-hotram karma suddham prajanam viksya vaidikam vyadadhad yajna-santatyai vedam ekam catur-vidham

catuh
four
hotram
sacrificial fires
karma suddham
purification of work
prajanam
of the people in general
viksya
after seeing
vaidikam
according to Vedic rites
vyadadhat
made into
yajna
sacrifice
santatyai
to expand
vedam ekam
only one Veda
catuh-vidham
in four divisions.

He saw that the sacrifices mentioned in the Vedas were means by which the people’s occupations could be purified. And to simplify the process he divided the one Veda into four, in order to expand them among men.