One verse

Srimad Bhagavatam 4.22.29

4.22.29

निमित्ते सति सर्वत्र जलादावपि पूरुष: । आत्मनश्च परस्यापि भिदां पश्यति नान्यदा ॥ २९ ॥

nimitte sati sarvatra jaladav api purusah atmanas ca parasyapi bhidam pasyati nanyada

nimitte
on account of causes
sati
being
sarvatra
everywhere
jala-adau api
water and other reflecting media
purusah
the person
atmanah
oneself
ca
and
parasya api
another’s self
bhidam
differentiation
pasyati
sees
na anyada
there is no other reason.

Only because of different causes does a person see a difference between himself and others, just as one sees the reflection of a body appearing differently manifested on water, on oil or in a mirror.