One verse

Srimad Bhagavatam 4.17.3

4.17.3

विदुर उवाच कस्माद्दधार गोरूपं धरित्री बहुरूपिणी । यां दुदोह पृथुस्तत्र को वत्सो दोहनं च किम् ॥ ३ ॥

vidura uvaca kasmad dadhara go-rupam dharitri bahu-rupini yam dudoha prthus tatra ko vatso dohanam ca kim

vidurah uvaca
Vidura inquired
kasmat
why
dadhara
took
go-rupam
the shape of a cow
dharitri
the earth
bahu-rupini
who has many other forms
yam
whom
dudoha
milked
prthuh
King Prthu
tatra
there
kah
who
vatsah
the calf
dohanam
the milking pot
ca
also
kim
what.

Vidura inquired from the great sage Maitreya: My dear brahmana, since mother earth can appear in different shapes, why did she take the shape of a cow? And when King Prthu milked her, who became the calf, and what was the milking pot?