One verse

Srimad Bhagavatam 4.29.76-77

4.29.76-77

यथा तृणजलूकेयं नापयात्यपयाति च । न त्यजेन्म्रियमाणोऽपि प्राग्देहाभिमतिं जन: ॥ ७६ ॥ यावदन्यं न विन्देत व्यवधानेन कर्मणाम् । मन एव मनुष्येन्द्र भूतानां भवभावनम् ॥ ७७ ॥

yatha trna-jalukeyam napayaty apayati ca na tyajen mriyamano ’pi prag-dehabhimatim janah yavad anyam na vindeta vyavadhanena karmanam mana eva manusyendra bhutanam bhava-bhavanam

yatha
as
trna-jaluka
caterpillar
iyam
this
na apayati
does not go
apayati
goes
ca
also
na
not
tyajet
gives up
mriyamanah
at the point of death
api
even
prak
former
deha
with the body
abhimatim
identification
janah
a person
yavat
so long as
anyam
another
na
not
vindeta
obtains
vyavadhanena
by the termination
karmanam
of fruitive activities
manah
the mind
eva
certainly
manusya-indra
O ruler of men
bhutanam
of all living entities
bhava
of material existence
bhavanam
the cause

The caterpillar transports itself from one leaf to another by capturing one leaf before giving up the other. Similarly, according to his previous work, the living entity must capture another body before giving up the one he has. This is because the mind is the reservoir of all kinds of desires.