One verse

Srimad Bhagavatam 3.12.35

3.12.35

चातुर्होत्रं कर्मतन्त्रमुपवेदनयै: सह । धर्मस्य पादाश्चत्वारस्तथैवाश्रमवृत्तय: ॥ ३५ ॥

catur-hotram karma-tantram upaveda-nayaih saha dharmasya padas catvaras tathaivasrama-vrttayah

catuh
four
hotram
paraphernalia for sacrifice
karma
action
tantram
expansions of such activities
upaveda
supplementary to the Vedas
nayaih
by logical conclusions
saha
along with
dharmasya
of religiosity
padah
principles
catvarah
four
tatha eva
in the same way
asrama
social orders
vrttayah
occupations.

The four kinds of paraphernalia for conducting the fire sacrifice became manifest: the performer (the chanter), the offerer, the fire, and the action performed in terms of the supplementary Vedas. Also the four principles of religiosity (truth, austerity, mercy and cleanliness) and the duties in the four social orders all became manifest.