One verse

Srimad Bhagavatam 4.11.10

4.11.10

नायं मार्गो हि साधूनां हृषीकेशानुवर्तिनाम् । यदात्मानं पराग्गृह्य पशुवद्भूतवैशसम् ॥ १० ॥

nayam margo hi sadhunam hrsikesanuvartinam yad atmanam parag grhya pasuvad bhuta-vaisasam

na
never
ayam
this
margah
path
hi
certainly
sadhunam
of honest persons
hrsikesa
of the Supreme Personality of Godhead
anuvartinam
following the path
yat
which
atmanam
self
parak
the body
grhya
thinking to be
pasu-vat
like animals
bhuta
of living entities
vaisasam
killing.

One should not accept the body as the self and thus, like the animals, kill the bodies of others. This is especially forbidden by saintly persons, who follow the path of devotional service to the Supreme Personality of Godhead.