One verse

Srimad Bhagavatam 3.10.8

3.10.8

पद्मकोशं तदाविश्य भगवत्कर्मचोदित: । एकं व्यभाङ्‌क्षीदुरुधा त्रिधा भाव्यं द्विसप्तधा ॥ ८ ॥

padma-kosam tadavisya bhagavat-karma-coditah ekam vyabhanksid urudha tridha bhavyam dvi-saptadha

padma-kosam
the whorl of the lotus
tada
then
avisya
entering into
bhagavat
by the Supreme Personality of Godhead
karma
in activities
coditah
being encouraged by
ekam
one
vyabhanksit
divided into
urudha
great division
tridha
three divisions
bhavyam
capable of further creation
dvi-saptadha
fourteen divisions.

Thus engaged in the service of the Supreme Personality of Godhead, Lord Brahma entered into the whorl of the lotus, and as it spread all over the universe he divided it into three divisions of worlds and later into fourteen divisions.