One verse

Srimad Bhagavatam 3.8.19

3.8.19

स इत्थमुद्वीक्ष्य तदब्जनाल- नाडीभिरन्तर्जलमाविवेश । नार्वाग्गतस्तत्खरनालनाल- नाभिं विचिन्वंस्तदविन्दताज: ॥ १९ ॥

sa ittham udviksya tad-abja-nala- nadibhir antar-jalam avivesa narvag-gatas tat-khara-nala-nala- nabhim vicinvams tad avindatajah

sah
he (Brahma)
ittham
in this way
udviksya
contemplating
tat
that
abja
lotus
nala
stem
nadibhih
by the pipe
antah-jalam
within the water
avivesa
entered into
na
not
arvak-gatah
in spite of going inside
tat-khara-nala
the stem of the lotus
nala
pipe
nabhim
of the navel
vicinvan
thinking much of it
tat
that
avindata
understood
ajah
the self-born.

Lord Brahma, thus contemplating, entered the water through the channel of the stem of the lotus. But in spite of entering the stem and going nearer to the navel of Visnu, he could not trace out the root.