One verse

Srimad Bhagavatam 11.22.39

11.22.39

विषयाभिनिवेशेन नात्मानं यत् स्मरेत् पुन: । जन्तोर्वै कस्यचिद्धेतोर्मृत्युरत्यन्तविस्मृति: ॥ ३९ ॥

viṣayābhiniveśena nātmānaṁ yat smaret punaḥ jantor vai kasyacid dhetor mṛtyur atyanta-vismṛtiḥ

viṣaya
in (new) objects of perception
abhiniveśena
because of absorption
na
not
ātmānam
his previous self
yat
the situation in which
smaret
remembers
punaḥ
any more
jantoḥ
of the living entity
vai
indeed
kasyacit hetoḥ
for any reason or other
mṛtyuḥ
known as death
atyanta
total
vismṛtiḥ
forgetfulness

When the living entity passes from the present body to the next body, which is created by his own karma, he becomes absorbed in the pleasurable and painful sensations of the new body and completely forgets the experience of the previous body. This total forgetfulness of one’s previous material identity, which comes about for one reason or another, is called death.